13232 + Interview Questions in Physics Page 12 InterviewSolution

551.	A car moving on a straight path covers a distance of 1 km due east in 100 s.What is (i) the speed and (ii) the velocity, of car ?
Answer» A car moving on a straight path covers a distance of 1 km due east in 100 s.What is (i) the speed and (ii) the velocity, of car ?

Discussion

552.	What type of surface is needed for the reflection of sound waves? A- Smooth surface only B- Smooth and polished surfaces C-Hard surfaces only D-Polished and rough surface
Answer» What type of surface is needed for the reflection of sound waves? A- Smooth surface only B- Smooth and polished surfaces C-Hard surfaces only D-Polished and rough surface

552.

What type of surface is needed for the reflection of sound waves? A- Smooth surface only B- Smooth and polished surfaces C-Hard surfaces only D-Polished and rough surface

Answer»

What type of surface is needed for the reflection of sound waves?

A- Smooth surface only

B- Smooth and polished surfaces

C-Hard surfaces only

D-Polished and rough surface

Discussion

553.	In pairs copy and complete the summary of the poem with suitable words/expressions:- A Scottish Chieftain and his beloved were (a) _____________from her wrathful father. As they reached the shores, the (b) ____________ told a boatman to (c) ____________ them across Lochgyle. He asked him to do it fast because if (d) ______________found them, they would kill him. The boatman (e) ________________to take them not for the (f) _____________that the chieftain offered but for his (g) ____________. By this time, the storm had (h) _____________and a wild wind had started blowing. The sound of (i) _______________could be heard close at hand. The lady urged the boatman (j) _____________as she did not want to face an angry father. Their boat left the (k) ______________and as it got caught in the stormy sea, Lord Ullin reached the deadly (l)_____________. His anger changed to wailing when he saw his daughter (m) ______________. He asked her to return back. But it was (n) __________ as the stormy sea claimed his daughter and her lover.
Answer» In pairs copy and complete the summary of the poem with suitable words/expressions:- A Scottish Chieftain and his beloved were (a) _____________from her wrathful father. As they reached the shores, the (b) ____________ told a boatman to (c) ____________ them across Lochgyle. He asked him to do it fast because if (d) ______________found them, they would kill him. The boatman (e) ________________to take them not for the (f) _____________that the chieftain offered but for his (g) ____________. By this time, the storm had (h) _____________and a wild wind had started blowing. The sound of (i) _______________could be heard close at hand. The lady urged the boatman (j) _____________as she did not want to face an angry father. Their boat left the (k) ______________and as it got caught in the stormy sea, Lord Ullin reached the deadly (l)_____________. His anger changed to wailing when he saw his daughter (m) ______________. He asked her to return back. But it was (n) __________ as the stormy sea claimed his daughter and her lover.

553.

In pairs copy and complete the summary of the poem with suitable words/expressions:- A Scottish Chieftain and his beloved were (a) _from her wrathful father. As they reached the shores, the (b) told a boatman to (c) them across Lochgyle. He asked him to do it fast because if (d) found them, they would kill him. The boatman (e) to take them not for the (f) _that the chieftain offered but for his (g) . By this time, the storm had (h) _and a wild wind had started blowing. The sound of (i) ___could be heard close at hand. The lady urged the boatman (j) _as she did not want to face an angry father. Their boat left the (k) __and as it got caught in the stormy sea, Lord Ullin reached the deadly (l)_. His anger changed to wailing when he saw his daughter (m) . He asked her to return back. But it was (n) __ as the stormy sea claimed his daughter and her lover.

Answer»

In
pairs copy and complete the summary of the poem with suitable
words/expressions:-

A
Scottish Chieftain and his beloved were (a) _____________from her
wrathful father. As they reached the shores, the (b) ____________
told a boatman to (c) ____________ them across Lochgyle. He asked him
to do it fast because if (d) ______________found them, they would
kill him. The boatman (e) ________________to take them not for the

(f)
_____________that the chieftain offered but for his (g) ____________.
By this time, the storm had (h) _____________and a wild wind had
started blowing. The sound of

(i)
_______________could be heard close at hand. The lady urged the
boatman

(j)
_____________as she did not want to face an angry father.

Their
boat left the (k) ______________and as it got caught in the stormy
sea, Lord Ullin reached the deadly (l)_____________. His anger
changed to wailing when he saw his daughter (m) ______________. He
asked her to return back. But it was (n) __________ as the stormy sea
claimed his daughter and her lover.

Discussion

554.	A bulb draws 24 W, when connected to a 12 V supply. Find the power if it is connected to a 6 V supply.(Neglect resistance change due to unequal heating in the two cases.)
Answer» A bulb draws $24 W,$ when connected to a $12 V$ supply. Find the power if it is connected to a $6 V$ supply. (Neglect resistance change due to unequal heating in the two cases.)

Discussion

555.	द्विवेदी जी ने शिरीष के माध्यम से कोलाहल व संघर्ष से भरी जीवन-स्थितियों में अविचल कर जिजीविषु बने रहने की सीख दी है। स्पष्ट करें।
Answer» द्विवेदी जी ने शिरीष के माध्यम से कोलाहल व संघर्ष से भरी जीवन-स्थितियों में अविचल कर जिजीविषु बने रहने की सीख दी है। स्पष्ट करें।

Discussion

556.	the rear face of an equiconvex lens of focal length 30 cm is silvered so that it behacea lika a concave mirror. the focal length of the mirror is options- 1. 7.5 cm 2. 15 cm 3. 30 cm 4. 20 c
Answer» the rear face of an equiconvex lens of focal length 30 cm is silvered so that it behacea lika a concave mirror. the focal length of the mirror is options- 1. 7.5 cm 2. 15 cm 3. 30 cm 4. 20 c

Discussion

557.	Two particles of masses 'm' and '2m' are connected by massless string of length 3 meter and whole system is rotating about their centre of mass with angular speed 'ω'. The kinetic energy ofsystem is
Answer» Two particles of masses 'm' and '2m' are connected by massless string of length 3 meter and whole system is rotating about their centre of mass with angular speed 'ω'. The kinetic energy ofsystem is

Discussion

558.	Consider 2 mirrors arranged at right angle as shown. A ray is incident at an angle of 30∘ to the normal of the mirror 1.What is the angle made by the outgoing ray with the normal of mirror 2? [3 MARKS]
Answer» Consider 2 mirrors arranged at right angle as shown. A ray is incident at an angle of $30^{\circ}$ to the normal of the mirror 1. What is the angle made by the outgoing ray with the normal of mirror 2? [3 MARKS]

558.

Consider 2 mirrors arranged at right angle as shown. A ray is incident at an angle of 30∘ to the normal of the mirror 1.What is the angle made by the outgoing ray with the normal of mirror 2? [3 MARKS]

Answer»

Consider 2 mirrors arranged at right angle as shown. A ray is incident at an angle of $30^{\circ}$ to the normal of the mirror 1.

What is the angle made by the outgoing ray with the normal of mirror 2? [3 MARKS]

Discussion

559.	The two radioactive materials X1 and X2 have decay constents 10 λ and λ.If initially they have same no. of nuclei, then the ratio of no. of nuclei of X1 to that of X2 will be:
Answer» The two radioactive materials X1 and X2 have decay constents 10 λ and λ.If initially they have same no. of nuclei, then the ratio of no. of nuclei of X1 to that of X2 will be:

Discussion

560.	THE LINEAR HAND OF THE SECOND HAND OF A WALL CLOCK IS 1CM/S THE LENGTH OF THE SECOND HAND IS NEARLY?
Answer» THE LINEAR HAND OF THE SECOND HAND OF A WALL CLOCK IS 1CM/S THE LENGTH OF THE SECOND HAND IS NEARLY?

Discussion

561.	Are the walls of classroom at rest or in motion?
Answer» Are the walls of classroom at rest or in motion?

Discussion

562.	Question 11To convert an AC generator into DC generator(a) split-ring type commutator must be used(b) slip rings and brushes must be used(c) a stronger magnetic field has to be used(d) a rectangular wire loop has to be used
Answer» Question 11 To convert an AC generator into DC generator (a) split-ring type commutator must be used (b) slip rings and brushes must be used (c) a stronger magnetic field has to be used (d) a rectangular wire loop has to be used

Discussion

563.	An object is moving along a straight line with a uniform speed of 10m/sec.Plot a graph showing distance versus time from t=0 to t=10sec
Answer» An object is moving along a straight line with a uniform speed of 10m/sec.Plot a graph showing distance versus time from t=0 to t=10sec

Discussion

564.	Question 7Area under a v – t graph represents a physical quantity which has the unit(a) m2(b) m(c) m3(d) m/s
Answer» Question 7 Area under a v – t graph represents a physical quantity which has the unit (a) $m^{2}$ (b) $m$ (c) $m^{3}$ (d) $m / s$

Discussion

565.	The Velocity of sound in air at 20°c is 340m/s.keeping the temperature constatnt,what Will the Velocity of sound in air when the pressure of the gas is doubled?
Answer» The Velocity of sound in air at 20°c is 340m/s.keeping the temperature constatnt,what Will the Velocity of sound in air when the pressure of the gas is doubled?

Discussion

566.	if a voltmeter of range v and resistance G is to be converted into ammeter of range (0-I)ampere how and what resistance should be connected
Answer» if a voltmeter of range v and resistance G is to be converted into ammeter of range (0-I)ampere how and what resistance should be connected

Discussion

567.	a ball is kicked at an angle of 45 degree with the ground. to hit a target which is 30 metres away and at a height of 10 metres. what should be the initial velocity
Answer» a ball is kicked at an angle of 45 degree with the ground. to hit a target which is 30 metres away and at a height of 10 metres. what should be the initial velocity

Discussion

568.	A ball P is thrown vertically upward with a velocity of 20m/s from top of building of height 25m. At same instant ball Q is thrown vertically downward with velocity of 20m/s. Find the difference of time between balls to hit the ground. Also find maximum height achieved by ball P above the top of building
Answer» A ball P is thrown vertically upward with a velocity of 20m/s from top of building of height 25m. At same instant ball Q is thrown vertically downward with velocity of 20m/s. Find the difference of time between balls to hit the ground. Also find maximum height achieved by ball P above the top of building

Discussion

569.	Identify the power source in the circuit.
Answer» Identify the power source in the circuit.

Discussion

570.	There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously on both the phones, but the ringing sound comes only from box B. This is because:Statement 1: In box B, there are air particles to vibrate and box A is a vacuum.Statement 2: Sound needs a medium for propagation.
Answer» There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously on both the phones, but the ringing sound comes only from box B. This is because: Statement 1: In box B, there are air particles to vibrate and box A is a vacuum. Statement 2: Sound needs a medium for propagation.

570.

There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously on both the phones, but the ringing sound comes only from box B. This is because:Statement 1: In box B, there are air particles to vibrate and box A is a vacuum.Statement 2: Sound needs a medium for propagation.

Answer»

There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously on both the phones, but the ringing sound comes only from box B. This is because:

Statement 1: In box B, there are air particles to vibrate and box A is a vacuum.

Statement 2: Sound needs a medium for propagation.

Discussion

571.	When an object is placed at a distance of 25 cm from a mirror, the magnification is m1. If the object is moved 15 cm further away with respect to the mirror, then the magnification becomes m2. If m1m2=4, the focal length of the mirror is :
Answer» When an object is placed at a distance of $25 cm$ from a mirror, the magnification is $m_{1}$ . If the object is moved $15 cm$ further away with respect to the mirror, then the magnification becomes $m_{2}$ . If $\frac{m_{1}}{m_{2}} = 4$ , the focal length of the mirror is :

Discussion

572.	For total internal reflection to take place, the angle of incidence i and the refractive index (μ) of the medium must satisfy the inequality
Answer» For total internal reflection to take place, the angle of incidence $i$ and the refractive index ( $μ$ ) of the medium must satisfy the inequality

Discussion

573.	The magnetic field at the centre of circular loop of area A is B. The magnetic moment of the loop will be
Answer» The magnetic field at the centre of circular loop of area $A$ is $B$ . The magnetic moment of the loop will be

Discussion

574.	If the intensity of loudness of a source is increased by 20 dB at a particular place, then intensity increases by n time, the value of n is a.2 b.100 c.200 d.10
Answer» If the intensity of loudness of a source is increased by 20 dB at a particular place, then intensity increases by n time, the value of n is a.2 b.100 c.200 d.10

Discussion

575.	'औरतों के परदे में अलग-थलग रहने से सामाजिक जीवन के विकास में रूकावट आई।' कैसे?
Answer» 'औरतों के परदे में अलग-थलग रहने से सामाजिक जीवन के विकास में रूकावट आई।' कैसे?

Discussion

576.	What is the temperature?
Answer» What is the temperature?

Discussion

577.	How many watts of power are spent when force of 2N is able to move a book of 1m in the time of 2 Seconds?
Answer» How many watts of power are spent when force of 2N is able to move a book of 1m in the time of 2 Seconds?

Discussion

578.	When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.
Answer» When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.

Discussion

579.	A body starts from rest at time t=0, accelerates uniformly and travels 320 m in 4 s. Find its velocity at time t=10s.
Answer» A body starts from rest at time $t = 0$ , accelerates uniformly and travels $320 m$ in $4 s$ . Find its velocity at time $t = 10 s$ .

Discussion

580.	Two trains, one is coming towards and another is going away from an observer both at 4 m/s produce a whistle simultaneously of frequency 300 Hz. Find the number of beats produced:1) 52) 63) 74) 12
Answer» Two trains, one is coming towards and another is going away from an observer both at 4 m/s produce a whistle simultaneously of frequency 300 Hz. Find the number of beats produced: 1) 5 2) 6 3) 7 4) 12

Discussion

581.	Question 20 (c) Boojho planned an activity to observe an object A through pipes as shown in figure, so that he could see objects which he could not directly see. What must be the angle with respect to the incident light at which he should place the mirrors?
Answer» Question 20 (c) Boojho planned an activity to observe an object A through pipes as shown in figure, so that he could see objects which he could not directly see. What must be the angle with respect to the incident light at which he should place the mirrors?

581.

Question 20 (c) Boojho planned an activity to observe an object A through pipes as shown in figure, so that he could see objects which he could not directly see. What must be the angle with respect to the incident light at which he should place the mirrors?

Answer»

Question 20 (c)

Boojho planned an activity to observe an object A through pipes as shown in figure, so that he could see objects which he could not directly see.

What must be the angle with respect to the incident light at which he should place the mirrors?

Discussion

582.	The gas responsible for global warming is:
Answer» The gas responsible for global warming is:

Discussion

583.	What is the principle of lactometer ?
Answer» What is the principle of lactometer ?

Discussion

584.	In the figure shown, two plane mirrors M1 and M2 are fixed on the two blocks A and B as shown in the figure. An object is placed midway between the two mirrors . Find the acceleration of the image formed by mirror-2 w.r.t the image formed by mirror-1.
Answer» In the figure shown, two plane mirrors $M_{1}$ and $M_{2}$ are fixed on the two blocks $A$ and $B$ as shown in the figure. An object is placed midway between the two mirrors . Find the acceleration of the image formed by mirror-2 w.r.t the image formed by mirror-1.

Discussion

585.	Give qualitative definition of force on the basis of newton's first law of motion.
Answer» Give qualitative definition of force on the basis of newton's first law of motion.

Discussion

586.	An object of mass 15 Kg is at a certain height above the ground. If the gravitational P.E. is 480 J, find the height( in meter) at which the object is w.r.t the ground(g=10m/s2)
Answer» An object of mass 15 Kg is at a certain height above the ground. If the gravitational P.E. is 480 J, find the height( in meter) at which the object is w.r.t the ground(g=10m/s²)

Discussion

587.	A dog is chasing a cat.the cat is running with a constant velocity u and the dog is running with constant speed c.at an instant direction of motion of the dog makes angle with that of the cat.and distance between them is r.find the magnitude of acceleration of the dog at that instant.
Answer» A dog is chasing a cat.the cat is running with a constant velocity u and the dog is running with constant speed c.at an instant direction of motion of the dog makes angle with that of the cat.and distance between them is r.find the magnitude of acceleration of the dog at that instant.

Discussion

588.	An infinitely long wire carrying current I and passes through origin alone i +j+k. Find the magnetic field at point 1,0,0
Answer» An infinitely long wire carrying current I and passes through origin alone i +j+k. Find the magnetic field at point 1,0,0

Discussion

589.	The acceleration-time graph of a body is shown below. If initial velocity of body is 20 m/s, then velocity of body after 10 s is
Answer» The acceleration-time graph of a body is shown below. If initial velocity of body is $20 m/s$ , then velocity of body after $10 s$ is

Discussion

590.	A body is moving with variable acceleration (a) along a straight line. The average acceleration of body in time interval t1 to t2 is
Answer» A body is moving with variable acceleration (a) along a straight line. The average acceleration of body in time interval t1 to t2 is

Discussion

591.	State the characteristics of an image formed by a concave mirror.
Answer» State the characteristics of an image formed by a concave mirror.

Discussion

592.	A car is moving on a circular track of radius r. If it doubles its speed, the centripetal force
Answer» A car is moving on a circular track of radius $r .$ If it doubles its speed, the centripetal force

Discussion

593.	A particle is travelling on the x-axis. Its velocity time graph is given: Which of the following graphs represent the same motion?
Answer» A particle is travelling on the x-axis. Its velocity time graph is given: Which of the following graphs represent the same motion?

593.

A particle is travelling on the x-axis. Its velocity time graph is given: Which of the following graphs represent the same motion?

Answer»

A particle is travelling on the x-axis. Its velocity time graph is given:

Which of the following graphs represent the same motion?

Discussion

594.	The current flowing through a resistor connected in an electric circuit and the potential difference developed across the ends of it are as shown in the diagram. Find the resistance of the resistor.
Answer» The current flowing through a resistor connected in an electric circuit and the potential difference developed across the ends of it are as shown in the diagram. Find the resistance of the resistor.

Discussion

595.	A bullet having a mass of 10 gram and moving with a speed of 1.5 metre per second when penetrates plank of mass 90gram the plank was initially at rest the bullet gets embedded in the wooden plank in both move together determine their velocity
Answer» A bullet having a mass of 10 gram and moving with a speed of 1.5 metre per second when penetrates plank of mass 90gram the plank was initially at rest the bullet gets embedded in the wooden plank in both move together determine their velocity

Discussion

596.	''काश कोई तो होता जो मेरी भावनाओं को गंभीरता से समझ पाता। अफ़सोस, ऐसा व्यक्ति मुझे अब तक नहीं मिला....।'' क्या आपको लगता है कि ऐन के इस कथन में उसके डायरी लेखन का कारण छिपा है?
Answer» ''काश कोई तो होता जो मेरी भावनाओं को गंभीरता से समझ पाता। अफ़सोस, ऐसा व्यक्ति मुझे अब तक नहीं मिला....।'' क्या आपको लगता है कि ऐन के इस कथन में उसके डायरी लेखन का कारण छिपा है?

Discussion

597.	A particle of mass moves with constant speed very on a circular path of radius r find magnitude of average force on it in a half revolution
Answer» A particle of mass moves with constant speed very on a circular path of radius r find magnitude of average force on it in a half revolution

Discussion

598.	The average velocity of Ram over a given time duration is 12 m/s. If he travels the first half of the total time with velocity x m/s and the seconds half of the total time with velocity 2x m/s. Calculate the value of x.
Answer» The average velocity of Ram over a given time duration is $12 m/s$ . If he travels the first half of the total time with velocity $x m/s$ and the seconds half of the total time with velocity $2 x m/s$ . Calculate the value of $x$ .

Discussion

599.	A boy of mass 50 kg running at 5 m/s jumps on to a 20 kg trolley travelling in the same direction at 1.5 m/s. What is their common velocity?
Answer» A boy of mass 50 kg running at 5 m/s jumps on to a 20 kg trolley travelling in the same direction at 1.5 m/s. What is their common velocity?

Discussion

600.	An open cubical †an k was initially fully filled with water . When the †an k was accelerated on a horizontal plank along one of its side its was found that one third of volume spilled out . Find the acceleration of the †an k
Answer» An open cubical †an k was initially fully filled with water . When the †an k was accelerated on a horizontal plank along one of its side its was found that one third of volume spilled out . Find the acceleration of the †an k

Discussion

Explore topic-wise InterviewSolutions in .

A car moving on a straight path covers a distance of 1 km due east in 100 s.What is (i) the speed and (ii) the velocity, of car ?

What type of surface is needed for the reflection of sound waves? A- Smooth surface only B- Smooth and polished surfaces C-Hard surfaces only D-Polished and rough surface

A bulb draws 24 W, when connected to a 12 V supply. Find the power if it is connected to a 6 V supply.(Neglect resistance change due to unequal heating in the two cases.)

the rear face of an equiconvex lens of focal length 30 cm is silvered so that it behacea lika a concave mirror. the focal length of the mirror is options- 1. 7.5 cm 2. 15 cm 3. 30 cm 4. 20 c

Two particles of masses 'm' and '2m' are connected by massless string of length 3 meter and whole system is rotating about their centre of mass with angular speed 'ω'. The kinetic energy ofsystem is

Consider 2 mirrors arranged at right angle as shown. A ray is incident at an angle of 30∘ to the normal of the mirror 1.What is the angle made by the outgoing ray with the normal of mirror 2? [3 MARKS]

The two radioactive materials X1 and X2 have decay constents 10 λ and λ.If initially they have same no. of nuclei, then the ratio of no. of nuclei of X1 to that of X2 will be:

THE LINEAR HAND OF THE SECOND HAND OF A WALL CLOCK IS 1CM/S THE LENGTH OF THE SECOND HAND IS NEARLY?

Are the walls of classroom at rest or in motion?

Question 11To convert an AC generator into DC generator(a) split-ring type commutator must be used(b) slip rings and brushes must be used(c) a stronger magnetic field has to be used(d) a rectangular wire loop has to be used

An object is moving along a straight line with a uniform speed of 10m/sec.Plot a graph showing distance versus time from t=0 to t=10sec

Question 7Area under a v – t graph represents a physical quantity which has the unit(a) m2(b) m(c) m3(d) m/s

The Velocity of sound in air at 20°c is 340m/s.keeping the temperature constatnt,what Will the Velocity of sound in air when the pressure of the gas is doubled?

if a voltmeter of range v and resistance G is to be converted into ammeter of range (0-I)ampere how and what resistance should be connected

a ball is kicked at an angle of 45 degree with the ground. to hit a target which is 30 metres away and at a height of 10 metres. what should be the initial velocity

Identify the power source in the circuit.

When an object is placed at a distance of 25 cm from a mirror, the magnification is m1. If the object is moved 15 cm further away with respect to the mirror, then the magnification becomes m2. If m1m2=4, the focal length of the mirror is :

For total internal reflection to take place, the angle of incidence i and the refractive index (μ) of the medium must satisfy the inequality

The magnetic field at the centre of circular loop of area A is B. The magnetic moment of the loop will be

If the intensity of loudness of a source is increased by 20 dB at a particular place, then intensity increases by n time, the value of n is a.2 b.100 c.200 d.10

'औरतों के परदे में अलग-थलग रहने से सामाजिक जीवन के विकास में रूकावट आई।' कैसे?

What is the temperature?

How many watts of power are spent when force of 2N is able to move a book of 1m in the time of 2 Seconds?

When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.

A body starts from rest at time t=0, accelerates uniformly and travels 320 m in 4 s. Find its velocity at time t=10s.

Two trains, one is coming towards and another is going away from an observer both at 4 m/s produce a whistle simultaneously of frequency 300 Hz. Find the number of beats produced:1) 52) 63) 74) 12

Question 20 (c) Boojho planned an activity to observe an object A through pipes as shown in figure, so that he could see objects which he could not directly see. What must be the angle with respect to the incident light at which he should place the mirrors?

The gas responsible for global warming is:

What is the principle of lactometer ?

In the figure shown, two plane mirrors M1 and M2 are fixed on the two blocks A and B as shown in the figure. An object is placed midway between the two mirrors . Find the acceleration of the image formed by mirror-2 w.r.t the image formed by mirror-1.

Give qualitative definition of force on the basis of newton's first law of motion.

An object of mass 15 Kg is at a certain height above the ground. If the gravitational P.E. is 480 J, find the height( in meter) at which the object is w.r.t the ground(g=10m/s2)

A dog is chasing a cat.the cat is running with a constant velocity u and the dog is running with constant speed c.at an instant direction of motion of the dog makes angle with that of the cat.and distance between them is r.find the magnitude of acceleration of the dog at that instant.

An infinitely long wire carrying current I and passes through origin alone i +j+k. Find the magnetic field at point 1,0,0

The acceleration-time graph of a body is shown below. If initial velocity of body is 20 m/s, then velocity of body after 10 s is

A body is moving with variable acceleration (a) along a straight line. The average acceleration of body in time interval t1 to t2 is

State the characteristics of an image formed by a concave mirror.

A car is moving on a circular track of radius r. If it doubles its speed, the centripetal force

A particle is travelling on the x-axis. Its velocity time graph is given: Which of the following graphs represent the same motion?

The current flowing through a resistor connected in an electric circuit and the potential difference developed across the ends of it are as shown in the diagram. Find the resistance of the resistor.

A bullet having a mass of 10 gram and moving with a speed of 1.5 metre per second when penetrates plank of mass 90gram the plank was initially at rest the bullet gets embedded in the wooden plank in both move together determine their velocity

A particle of mass moves with constant speed very on a circular path of radius r find magnitude of average force on it in a half revolution

The average velocity of Ram over a given time duration is 12 m/s. If he travels the first half of the total time with velocity x m/s and the seconds half of the total time with velocity 2x m/s. Calculate the value of x.

A boy of mass 50 kg running at 5 m/s jumps on to a 20 kg trolley travelling in the same direction at 1.5 m/s. What is their common velocity?

An open cubical †an k was initially fully filled with water . When the †an k was accelerated on a horizontal plank along one of its side its was found that one third of volume spilled out . Find the acceleration of the †an k