9478 + Interview Questions in Physics Page 68 InterviewSolution

3351.	Two very small balls each having mass m, are attached to 2 massless rods of length l. Now these rods are joined to form a V like figure having angle 60. This assembly is now hinged in a vertical plane so that it can rotate without any friction about a horizontal axis [perpendicular to the plane]. The period of small oscillation of this assembly is ?
Answer» Two very small balls each having mass m, are attached to 2 massless rods of length l. Now these rods are joined to form a V like figure having angle 60. This assembly is now hinged in a vertical plane so that it can rotate without any friction about a horizontal axis [perpendicular to the plane]. The period of small oscillation of this assembly is ?

Discussion

3352.	The constellation Orion is associated with the legend of Osiris, the god of the afterlife. Find out the astronomical descriptions and legends associated with the following.(i) Ursa Major (saptarishi mandala)(ii) Polaris (Dhruva tara)(iii) Pegasus (winged horse)(iv) Sirius (Dog star)(v) Gemini (Mithuna)
Answer» The constellation Orion is associated with the legend of Osiris, the god of the afterlife. Find out the astronomical descriptions and legends associated with the following. (i) Ursa Major (saptarishi mandala) (ii) Polaris (Dhruva tara) (iii) Pegasus (winged horse) (iv) Sirius (Dog star) (v) Gemini (Mithuna)

Discussion

3353.	Question 5A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror.At which point should the eye be placed, so that the hole can be seen?
Answer» Question 5 A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror. At which point should the eye be placed, so that the hole can be seen?

3353.

Question 5A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror.At which point should the eye be placed, so that the hole can be seen?

Answer»

Question 5

A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror.

At which point should the eye be placed, so that the hole can be seen?

Discussion

3354.	Generally, when we speak of the charge on the body we mean the
Answer» Generally, when we speak of the charge on the body we mean the

Discussion

3355.	Do liquids conduct electricity? How can we check for the conductivity of liquids using a tester?
Answer» Do liquids conduct electricity? How can we check for the conductivity of liquids using a tester?

Discussion

3356.	5 Vol H2O2 solution is equivalent to1.5% H2O26% H2O23% H2O25% H2O2
Answer» 5 Vol H2O2 solution is equivalent to 1.5% H2O2 6% H2O2 3% H2O2 5% H2O2

Discussion

3357.	convex mirror used in a vehicle has radius of curvature 3m bus is located at a distance of 5m from the mirror find the position and the nature of the image
Answer» convex mirror used in a vehicle has radius of curvature 3m bus is located at a distance of 5m from the mirror find the position and the nature of the image

Discussion

3358.	An aircraft flies just below a negatively charged thundercloud.Answer these questions.1. Will any electrostatic charges be included on the aircraft?2. If so, draw the signs and positions of the induced charges on the aircraft.3. Explain the distribution of the charges that you have shown on the basis of the movement of electrons.4. Draw a diagram to show the charges after the aircraft has flown away from the cloud.5. Explain the distribution of charges you have shown in Ans. 4 on the basis of the movement of electrons.
Answer» An aircraft flies just below a negatively charged thundercloud. Answer these questions. 1. Will any electrostatic charges be included on the aircraft? 2. If so, draw the signs and positions of the induced charges on the aircraft. 3. Explain the distribution of the charges that you have shown on the basis of the movement of electrons. 4. Draw a diagram to show the charges after the aircraft has flown away from the cloud. 5. Explain the distribution of charges you have shown in Ans. 4 on the basis of the movement of electrons.

Discussion

3359.	a particle is at rest at t=0. If acceleration of the particle is given as a=sinπt+cosπt in SI units,then maximum speed of the particle is2
Answer» a particle is at rest at t=0. If acceleration of the particle is given as a=sinπt+cosπt in SI units,then maximum speed of the particle is 2

Discussion

3360.	What are the uses of artificial satellite
Answer» What are the uses of artificial satellite

Discussion

3361.	resistivity of a conductor of lenghth l and area of cross section A is sesistivity.if its length is doubled and area of cross section is halved ,then its new resistivity
Answer» resistivity of a conductor of lenghth l and area of cross section A is sesistivity.if its length is doubled and area of cross section is halved ,then its new resistivity

Discussion

3362.	{ 26. A sample of metal weighs }210g in air, }180g in }}{ water and }120g in an unknown liquid. Then }}{ [Assume sample of metal completely immersed in } } water and liquid]}{ (1) The density of the metal is }3g/cm^3}{ (2) The density of the metal is }37g/cm^3}{ (3) Density of the metal is }20 times the density of }} unknown liquid } (4) The metal will float in water
Answer» { 26. A sample of metal weighs }210g in air, }180g in }}{ water and }120g in an unknown liquid. Then }}{ [Assume sample of metal completely immersed in } } water and liquid]}{ (1) The density of the metal is }3g/cm^3}{ (2) The density of the metal is }37g/cm^3}{ (3) Density of the metal is }20 times the density of }} unknown liquid } (4) The metal will float in water

Discussion

3363.

Match the following words with their meanings. You can take the help of a dictionary. halted people travelling in buses, trains etc. passengers stopped defended completely shuddered many times several occasions trembled or shook violently interruption break the continuity of entirely protected from attack

Answer»

Match the following words with their meanings. You can take the help of a dictionary.

halted	people travelling in buses, trains etc.
passengers	stopped
defended	completely
shuddered	many times
several occasions	trembled or shook violently
interruption	break the continuity of
entirely	protected from attack

Discussion

3364.	A transparent film of thickness t and refractive index μ is placed in front of one of the slits in a Young's double slit experiment. As a result, the interference pattern shifts through a distance S. Which of the following graphs correctly represents the variation of S with t, as other parameters remain constant?
Answer» A transparent film of thickness $t$ and refractive index $μ$ is placed in front of one of the slits in a Young's double slit experiment. As a result, the interference pattern shifts through a distance $S$ . Which of the following graphs correctly represents the variation of $S$ with $t$ , as other parameters remain constant?

Discussion

3365.	Why did the rubbed steel spoon did not get attracted to the paper ?
Answer» Why did the rubbed steel spoon did not get attracted to the paper ?

Discussion

3366.	Q) Instead of taking the trouble of electroplating metals with chromium for making car parts , taps , cycle parts , etc., why are these objects not made up of chromium itself ? A) This is because chromium is a very expensive metals . It is a metal which does not rust is resistant from scratches and has a shiny appearance . If we use chromium it will be a huge loss and it also be wastage of the resource chromium thus it is preferable to use chromium only for electroplating objects. Could you please check my answer and give inputs.
Answer» Q) Instead of taking the trouble of electroplating metals with chromium for making car parts , taps , cycle parts , etc., why are these objects not made up of chromium itself ? A) This is because chromium is a very expensive metals . It is a metal which does not rust is resistant from scratches and has a shiny appearance . If we use chromium it will be a huge loss and it also be wastage of the resource chromium thus it is preferable to use chromium only for electroplating objects. Could you please check my answer and give inputs.

3366.

Q) Instead of taking the trouble of electroplating metals with chromium for making car parts , taps , cycle parts , etc., why are these objects not made up of chromium itself ? A) This is because chromium is a very expensive metals . It is a metal which does not rust is resistant from scratches and has a shiny appearance . If we use chromium it will be a huge loss and it also be wastage of the resource chromium thus it is preferable to use chromium only for electroplating objects. Could you please check my answer and give inputs.

Answer»

Q) Instead of taking the trouble of electroplating metals with chromium for making car parts , taps , cycle parts , etc., why are these objects not made up of chromium itself ?

A) This is because chromium is a very expensive metals . It is a metal which does not rust is resistant from scratches and has a shiny appearance . If we use chromium it will be a huge loss and it also be wastage of the resource chromium thus it is preferable to use chromium only for electroplating objects.

Could you please check my answer and give inputs.

Discussion

3367.	There are two blocks of masses m1 and m2,the coefficient of friction is ,what is the minimun value of F to move block of mass m2 ,if two masses is connected by a spring?
Answer» There are two blocks of masses m1 and m2,the coefficient of friction is ,what is the minimun value of F to move block of mass m2 ,if two masses is connected by a spring?

Discussion

3368.	A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to {v(x)=β x^{-2n , where β and n are constants and x is the position of the particle. The acceleration of the particle { as a function of x , is given by
Answer» A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to {v(x)=β x^{-2n , where β and n are constants and x is the position of the particle. The acceleration of the particle { as a function of x , is given by

Discussion

3369.	A weightless cantilever beam of span L is loaded as shown in the figure. For the entire span of the beam, the material properties are identical and the cross section is rectangular with constant width.From the flexure-critical perspective, the most economical longitudinal profile of the beam to carry the given loads amongst the options given below, is
Answer» A weightless cantilever beam of span L is loaded as shown in the figure. For the entire span of the beam, the material properties are identical and the cross section is rectangular with constant width. From the flexure-critical perspective, the most economical longitudinal profile of the beam to carry the given loads amongst the options given below, is

Discussion

3370.	The prestressing force in the tendon is 1200 kN, acting on a beam section of 400 mm × 600 mm. Span of the beam is 6 m and carries an all inclusive load of 40 kN/m. If the profile of the beam is as per load balancing cable for the beam then the cable should be provided with a central dip of _____ mm.150
Answer» The prestressing force in the tendon is 1200 kN, acting on a beam section of 400 mm $\times$ 600 mm. Span of the beam is 6 m and carries an all inclusive load of 40 kN/m. If the profile of the beam is as per load balancing cable for the beam then the cable should be provided with a central dip of _____ mm. 150

Discussion

3371.	a ball is thrown vertically upwards with speed u. if it experiences a cons†an t air resis†an ce force of magnitude f ,then the speed with which ball strikes the ground, (weight of ball is w) is
Answer» a ball is thrown vertically upwards with speed u. if it experiences a cons†an t air resis†an ce force of magnitude f ,then the speed with which ball strikes the ground, (weight of ball is w) is

Discussion

3372.	5. A force is given as FVa2eBwhere F is force,v is velocity. Then dimensional formula of a B is-2(1) \lbrack M L T21(2) \lbrack M2 L2 T 2\rbrack(3) \lbrack M2 L2 T\rbrack(4) \lbrack M L2 T-21
Answer» 5. A force is given as FVa2eBwhere F is force,v is velocity. Then dimensional formula of a B is-2(1) \lbrack M L T21(2) \lbrack M2 L2 T 2\rbrack(3) \lbrack M2 L2 T\rbrack(4) \lbrack M L2 T-21

Discussion

3373.	If the speed of a body is 5ms, then the time it would take to cover a distance of 6 km is:
Answer» If the speed of a body is $5 \frac{m}{s}$ , then the time it would take to cover a distance of 6 km is:

Discussion

3374.	Collect data (in decibels) of 10 different things in terms of loudness arrange the data in ascending order and final mean median and mode for the same.
Answer» Collect data (in decibels) of 10 different things in terms of loudness arrange the data in ascending order and final mean median and mode for the same.

Discussion

3375.	An infinite line charge produces a field of 18*10(to the power of 10) N/C at a distance of 1m. The linear charge density is?
Answer» An infinite line charge produces a field of 18*10(to the power of 10) N/C at a distance of 1m. The linear charge density is?

Discussion

3376.	What does the underlined preposition indicate? The trolley had an ornate handle which the maid used for pushing it around the house.
Answer» What does the underlined preposition indicate? The trolley had an ornate handle which the maid used for pushing it around the house.

3376.

What does the underlined preposition indicate? The trolley had an ornate handle which the maid used for pushing it around the house.

Answer»

What does the underlined preposition indicate?

The trolley had an ornate handle which the maid used for pushing it around the house.

Discussion

3377.	36 km/hr = _______m/s
Answer» $36 k m / h r$ = _______ $m / s$

Discussion

3378.	(4) . Two blocks A and B of masses 5 kgrespectively rest on a smooth horizontal surfacewith B over A. The coefficient of friction betweenand B is 0.5. The maximum horizonta(in kg wt.) that can be applied to A, so that therwill be motion of A and B without relative slipping,(2) 2.5(3) 4
Answer» (4) . Two blocks A and B of masses 5 kgrespectively rest on a smooth horizontal surfacewith B over A. The coefficient of friction betweenand B is 0.5. The maximum horizonta(in kg wt.) that can be applied to A, so that therwill be motion of A and B without relative slipping,(2) 2.5(3) 4

Discussion

3379.	The poetry of earth continues round the year through a cycle of two seasons. Mention each with its representative voice.
Answer» The poetry of earth continues round the year through a cycle of two seasons. Mention each with its representative voice.

Discussion

3380.	A block weighing 1 kg is in the shape of a cube of length 10cm.it is kept on a horizontal table.find the pressure on the portion of the table where the block is kept.
Answer» A block weighing 1 kg is in the shape of a cube of length 10cm.it is kept on a horizontal table.find the pressure on the portion of the table where the block is kept.

Discussion

3381.	4 point charge +4,-5,+4,-5 are located at the corners of the side 5 cm the force on a charge four micro Columb are placed ay the point of intersection of the diagnol is?
Answer» 4 point charge +4,-5,+4,-5 are located at the corners of the side 5 cm the force on a charge four micro Columb are placed ay the point of intersection of the diagnol is?

Discussion

3382.	What is the general equation of a projectile motion on an inclined plane both up and down the plane which clearly proves that the path of the projectile is parabolic?
Answer» What is the general equation of a projectile motion on an inclined plane both up and down the plane which clearly proves that the path of the projectile is parabolic?

Discussion

3383.	105 calories of heat is required to raise the temperature of 3 moles if an ideal gas at cons†an t pressure from 30 Celsius to 35 Celsius.The amount of heat required to raise the temperature of the gas through the range \lbrack60 Celsius to 65 Celsius\rbrack at cons†an t volume is?\lbrack gamma=1.4\rbrack
Answer» 105 calories of heat is required to raise the temperature of 3 moles if an ideal gas at cons†an t pressure from 30 Celsius to 35 Celsius.The amount of heat required to raise the temperature of the gas through the range \lbrack60 Celsius to 65 Celsius\rbrack at cons†an t volume is?\lbrack gamma=1.4\rbrack

Discussion

3384.	58.Explain why melting point of a substance gives an indication of its purity
Answer» 58.Explain why melting point of a substance gives an indication of its purity

Discussion

3385.	The positive charge which is responsible for the flow of electricity is known as_____.
Answer» The positive charge which is responsible for the flow of electricity is known as_____.

Discussion

3386.	Electric field due to a rod of infinite length
Answer» Electric field due to a rod of infinite length

Discussion

3387.	What are the special advantages of a horse-shoe magnet?
Answer» What are the special advantages of a horse-shoe magnet?

Discussion

3388.	Question 3 Name three liquids, which when tested in the manner shown in Fig. 14.9, may cause the magnetic needle to deflect.
Answer» Question 3 Name three liquids, which when tested in the manner shown in Fig. 14.9, may cause the magnetic needle to deflect.

Discussion

3389.	What are MCB's? What is the use of it?
Answer» What are MCB's? What is the use of it?

Discussion

3390.	Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in
Answer» Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in

3390.

Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in

Answer»

Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in

Discussion

3391.	You are given a dise divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its colour when it is rotated rapidly ?
Answer» You are given a dise divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its colour when it is rotated rapidly ?

Discussion

3392.	9.8 g H2SO4 present in 250 mL of solution. Calculate the molarity of H2SO4, H+ and SO42- aqueous ion.
Answer» 9.8 g H2SO4 present in 250 mL of solution. Calculate the molarity of H2SO4, H+ and SO42- aqueous ion.

Discussion

3393.	A force F is applied to a stationary block as shown below.What is the direction of frictional force acting on the block?
Answer» A force F is applied to a stationary block as shown below. What is the direction of frictional force acting on the block?

Discussion

3394.	What is the numerical ratio of displacement to distance for a moving object?
Answer» What is the numerical ratio of displacement to distance for a moving object?

Discussion

3395.	Why is "Objects in mirror are closer than they appear" written on back and side mirrors of a vehicle? [5 MARKS]
Answer» Why is "Objects in mirror are closer than they appear" written on back and side mirrors of a vehicle? [5 MARKS]

Discussion

3396.	Fill in the following blanks with suitable words : (a) Like charges ........ ; unlike charges ........... (b) Rubbing glass with silk makes a .......... charge on the glass. (c) Combing your hair makes a ........ charge on the comb. (d) The negatively charged particles which are transferred from one object to another during charging by friction is called ....... (e) The charging of an object by rubbing it with another object is called charging by ........ (f) In an electroscope, the aluminium leaves diverge because like charges ......... (g) ......... is provided in buildings to protect us from electric shocks due to any leakage of electric current. (h) Lightning is nothing but an ......... spark. (i) Each fragment of earth's crust is called a ........
Answer» Fill in the following blanks with suitable words : (a) Like charges ........ ; unlike charges ........... (b) Rubbing glass with silk makes a .......... charge on the glass. (c) Combing your hair makes a ........ charge on the comb. (d) The negatively charged particles which are transferred from one object to another during charging by friction is called ....... (e) The charging of an object by rubbing it with another object is called charging by ........ (f) In an electroscope, the aluminium leaves diverge because like charges ......... (g) ......... is provided in buildings to protect us from electric shocks due to any leakage of electric current. (h) Lightning is nothing but an ......... spark. (i) Each fragment of earth's crust is called a ........

3396.

Fill in the following blanks with suitable words : (a) Like charges ........ ; unlike charges ........... (b) Rubbing glass with silk makes a .......... charge on the glass. (c) Combing your hair makes a ........ charge on the comb. (d) The negatively charged particles which are transferred from one object to another during charging by friction is called ....... (e) The charging of an object by rubbing it with another object is called charging by ........ (f) In an electroscope, the aluminium leaves diverge because like charges ......... (g) ......... is provided in buildings to protect us from electric shocks due to any leakage of electric current. (h) Lightning is nothing but an ......... spark. (i) Each fragment of earth's crust is called a ........

Answer»

Fill in the following blanks with suitable words :

(a) Like charges ........ ; unlike charges ...........

(b) Rubbing glass with silk makes a .......... charge on the glass.

(c) Combing your hair makes a ........ charge on the comb.

(d) The negatively charged particles which are transferred from one object to another during charging by friction is called .......

(e) The charging of an object by rubbing it with another object is called charging by ........

(f) In an electroscope, the aluminium leaves diverge because like charges .........

(g) ......... is provided in buildings to protect us from electric shocks due to any leakage of electric current.

(h) Lightning is nothing but an ......... spark.

(i) Each fragment of earth's crust is called a ........

Discussion

3397.	Question 20Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.(a) Object is placed between device and its focus, image formed is enlarged and behind it. (b) Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object. (c) Object is placed between infinity and device, image formed is diminished and between focus and optical centre on the same side as that of the object. (d) Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.
Answer» Question 20 Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case. (a) Object is placed between device and its focus, image formed is enlarged and behind it. (b) Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object. (c) Object is placed between infinity and device, image formed is diminished and between focus and optical centre on the same side as that of the object. (d) Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.

3397.

Question 20Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.(a) Object is placed between device and its focus, image formed is enlarged and behind it. (b) Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object. (c) Object is placed between infinity and device, image formed is diminished and between focus and optical centre on the same side as that of the object. (d) Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.

Answer» Question 20

Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.

(a) Object is placed between device and its focus, image formed is enlarged and behind it.

(b) Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object.

(c) Object is placed between infinity and device, image formed is diminished and between focus and optical centre on the same side as that of the object.

(d) Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.

Discussion

3398.	Which force is involved in the followng situations?
Answer» Which force is involved in the followng situations?

3398.

Which force is involved in the followng situations?

Answer»

Which force is involved in the followng situations?

Discussion

3399.	A juggler tosses a ball making an angle of 60° with the horizontal. He runs on a level ground and catches the ball. If he had thrown the ball with speed v, then his speed must be .......
Answer» A juggler tosses a ball making an angle of 60° with the horizontal. He runs on a level ground and catches the ball. If he had thrown the ball with speed v, then his speed must be .......

Discussion

3400.	Which of the following is not a reason for fitting spoilers on cars?
Answer» Which of the following is not a reason for fitting spoilers on cars?

Discussion

Explore topic-wise InterviewSolutions in .

Question 5A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror.At which point should the eye be placed, so that the hole can be seen?

Generally, when we speak of the charge on the body we mean the

Do liquids conduct electricity? How can we check for the conductivity of liquids using a tester?

5 Vol H2O2 solution is equivalent to1.5% H2O26% H2O23% H2O25% H2O2

convex mirror used in a vehicle has radius of curvature 3m bus is located at a distance of 5m from the mirror find the position and the nature of the image

a particle is at rest at t=0. If acceleration of the particle is given as a=sinπt+cosπt in SI units,then maximum speed of the particle is2

What are the uses of artificial satellite

resistivity of a conductor of lenghth l and area of cross section A is sesistivity.if its length is doubled and area of cross section is halved ,then its new resistivity

Why did the rubbed steel spoon did not get attracted to the paper ?

There are two blocks of masses m1 and m2,the coefficient of friction is ,what is the minimun value of F to move block of mass m2 ,if two masses is connected by a spring?

A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to {v(x)=β x^{-2n , where β and n are constants and x is the position of the particle. The acceleration of the particle { as a function of x , is given by

a ball is thrown vertically upwards with speed u. if it experiences a cons†an t air resis†an ce force of magnitude f ,then the speed with which ball strikes the ground, (weight of ball is w) is

5. A force is given as FVa2eBwhere F is force,v is velocity. Then dimensional formula of a B is-2(1) \lbrack M L T21(2) \lbrack M2 L2 T 2\rbrack(3) \lbrack M2 L2 T\rbrack(4) \lbrack M L2 T-21

If the speed of a body is 5ms, then the time it would take to cover a distance of 6 km is:

Collect data (in decibels) of 10 different things in terms of loudness arrange the data in ascending order and final mean median and mode for the same.

An infinite line charge produces a field of 18*10(to the power of 10) N/C at a distance of 1m. The linear charge density is?

What does the underlined preposition indicate? The trolley had an ornate handle which the maid used for pushing it around the house.

36 km/hr = _______m/s

(4) . Two blocks A and B of masses 5 kgrespectively rest on a smooth horizontal surfacewith B over A. The coefficient of friction betweenand B is 0.5. The maximum horizonta(in kg wt.) that can be applied to A, so that therwill be motion of A and B without relative slipping,(2) 2.5(3) 4

The poetry of earth continues round the year through a cycle of two seasons. Mention each with its representative voice.

A block weighing 1 kg is in the shape of a cube of length 10cm.it is kept on a horizontal table.find the pressure on the portion of the table where the block is kept.

4 point charge +4,-5,+4,-5 are located at the corners of the side 5 cm the force on a charge four micro Columb are placed ay the point of intersection of the diagnol is?

What is the general equation of a projectile motion on an inclined plane both up and down the plane which clearly proves that the path of the projectile is parabolic?

58.Explain why melting point of a substance gives an indication of its purity

The positive charge which is responsible for the flow of electricity is known as_____.

Electric field due to a rod of infinite length

What are the special advantages of a horse-shoe magnet?

Question 3 Name three liquids, which when tested in the manner shown in Fig. 14.9, may cause the magnetic needle to deflect.

What are MCB's? What is the use of it?

Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in

You are given a dise divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its colour when it is rotated rapidly ?

9.8 g H2SO4 present in 250 mL of solution. Calculate the molarity of H2SO4, H+ and SO42- aqueous ion.

A force F is applied to a stationary block as shown below.What is the direction of frictional force acting on the block?

What is the numerical ratio of displacement to distance for a moving object?

Why is "Objects in mirror are closer than they appear" written on back and side mirrors of a vehicle? [5 MARKS]

Which force is involved in the followng situations?

A juggler tosses a ball making an angle of 60° with the horizontal. He runs on a level ground and catches the ball. If he had thrown the ball with speed v, then his speed must be .......

Which of the following is not a reason for fitting spoilers on cars?