13232 + Interview Questions in Physics Page 20 InterviewSolution

951.	The position of a body moving along x-axis at time t is given by x = (t2-4t+6) m . The distance travelled by body in time interval t = 0 to t = 3 s is? - (1) 5 m (2) 7m (3) 4 m (4) 3 m
Answer» The position of a body moving along x-axis at time t is given by x = (t2-4t+6) m . The distance travelled by body in time interval t = 0 to t = 3 s is? - (1) 5 m (2) 7m (3) 4 m (4) 3 m

Discussion

952.	Why small focal length increases aberration??
Answer» Why small focal length increases aberration??

Discussion

953.	A solid block of iron sinks in fluid A but floats in another liquid B. What can be inferred about the properties of the fluids?
Answer» A solid block of iron sinks in fluid A but floats in another liquid B. What can be inferred about the properties of the fluids?

Discussion

954.	A gun fires n bullets per minute, each of mass m. If the speed of the bullet is v, then the magnitude of force (in SI unit) of recoil is
Answer» A gun fires n bullets per minute, each of mass m. If the speed of the bullet is v, then the magnitude of force (in SI unit) of recoil is

Discussion

955.	length of a minute hand of a clock is 4.5 cm.Find the average velocity of the tip of minute's hand between 6 A.M. to 6.30 A.M. & 6 A.M. to 6.30 P.M.
Answer» length of a minute hand of a clock is 4.5 cm.Find the average velocity of the tip of minute's hand between 6 A.M. to 6.30 A.M. & 6 A.M. to 6.30 P.M.

Discussion

956.	Draw the V-T graph of an object with uniform acceleration. What does the area under that measure
Answer» Draw the V-T graph of an object with uniform acceleration. What does the area under that measure

Discussion

957.	A semi-circular ring ofnmass m and radius R with linear charge density △, hinged at its centre is placed in a uniform electric field. If the ring is slightly rotated about O and released find the time period(in sec) of oscillation. take m=8kg, △=2C/m and E=2N/C. Assume that coil is rotated in its own plane:
Answer» A semi-circular ring ofnmass m and radius R with linear charge density △, hinged at its centre is placed in a uniform electric field. If the ring is slightly rotated about O and released find the time period(in sec) of oscillation. take m=8kg, △=2C/m and E=2N/C. Assume that coil is rotated in its own plane:

Discussion

958.	Find out how these images are connected to each other.
Answer» Find out how these images are connected to each other.

Discussion

959.	What is the formula to find speed of sound if distance and time is given
Answer» What is the formula to find speed of sound if distance and time is given

Discussion

960.	A nichrome wire 1m long and 1mm^{2 }in cross section area draws 4 ampere at 2 volt .The resistivity of nichrome is____
Answer» A nichrome wire 1m long and 1mm^{2 }in cross section area draws 4 ampere at 2 volt .The resistivity of nichrome is____

Discussion

961.	A body of volume 100 cm3 weighs 5 kgf in air. It is completely immersed in a liquid of density 1.8 ×103 kg m−3. Find : (i) the upthrust due to liquid and (ii) the weight of the body in liquid. (iii) the upthrust on the body. State the assumption made in part (i).
Answer» A body of volume 100 $c m^{3}$ weighs 5 kgf in air. It is completely immersed in a liquid of density 1.8 $\times 10^{3} k g m^{- 3}$ . Find : (i) the upthrust due to liquid and (ii) the weight of the body in liquid. (iii) the upthrust on the body. State the assumption made in part (i).

Discussion

962.	A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is
Answer» A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is

962.

A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is

Answer»

A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is

Discussion

963.	The mass ,radius of cross section, length has experimental value of (0\cdot3\pm0\cdot003)g, (0\cdot5\pm0\cdot005)mm, (6\pm0\cdot06)cm respectively. Error in measurement of density of the material is
Answer» The mass ,radius of cross section, length has experimental value of (0\cdot3\pm0\cdot003)g, (0\cdot5\pm0\cdot005)mm, (6\pm0\cdot06)cm respectively. Error in measurement of density of the material is

Discussion

964.	On account of melting of ice at the north pole the moment of inertia of spinning of earth - a)increases b)decreasas c)remains unchanged d)depends on the time
Answer» On account of melting of ice at the north pole the moment of inertia of spinning of earth - a)increases b)decreasas c)remains unchanged d)depends on the time

Discussion

965.	42.The density of a newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is R, then the radius of the planet would be ?
Answer» 42.The density of a newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is R, then the radius of the planet would be ?

Discussion

966.	A car starting from rest accelerates at the rate f through a distance S, then continues at constant speed for time t and then decelerates at the rate f/2 to come to rest. If the total distance traversed is 15 S, then
Answer» A car starting from rest accelerates at the rate f through a distance S, then continues at constant speed for time t and then decelerates at the rate f/2 to come to rest. If the total distance traversed is 15 S, then

Discussion

967.	Solve the following examples:(1) An object of mass 16 kg moves with an acceleration of 3 m/s2. Calculate the force acting on it. If the same force is applied to another object of mass 24 kg, what will be the acceleration?[Ans : 48 N, 2 m/s2](2) A bullet of mass 10 g moving with velocity of 1.5 m/s hits a thick wooden plank of mass 90 g. The plank is initially at rest, but when it gets hit by the bullet, the bullet remains in the plank and both move with a certain speed. Calculate the speed with which plank containing the bullet moves?[Ans : 0.15 m/s]
Answer» Solve the following examples: (1) An object of mass 16 kg moves with an acceleration of 3 m/s². Calculate the force acting on it. If the same force is applied to another object of mass 24 kg, what will be the acceleration? [Ans : 48 N, 2 m/s²] (2) A bullet of mass 10 g moving with velocity of 1.5 m/s hits a thick wooden plank of mass 90 g. The plank is initially at rest, but when it gets hit by the bullet, the bullet remains in the plank and both move with a certain speed. Calculate the speed with which plank containing the bullet moves? [Ans : 0.15 m/s]

967.

Solve the following examples:(1) An object of mass 16 kg moves with an acceleration of 3 m/s2. Calculate the force acting on it. If the same force is applied to another object of mass 24 kg, what will be the acceleration?[Ans : 48 N, 2 m/s2](2) A bullet of mass 10 g moving with velocity of 1.5 m/s hits a thick wooden plank of mass 90 g. The plank is initially at rest, but when it gets hit by the bullet, the bullet remains in the plank and both move with a certain speed. Calculate the speed with which plank containing the bullet moves?[Ans : 0.15 m/s]

Answer»

Solve the following examples:

(1) An object of mass 16 kg moves with an acceleration of 3 m/s². Calculate the force acting on it. If the same force is applied to another object of mass 24 kg, what will be the acceleration?

[Ans : 48 N, 2 m/s²]

(2) A bullet of mass 10 g moving with velocity of 1.5 m/s hits a thick wooden plank of mass 90 g. The plank is initially at rest, but when it gets hit by the bullet, the bullet remains in the plank and both move with a certain speed. Calculate the speed with which plank containing the bullet moves?

[Ans : 0.15 m/s]

Discussion

968.	A force of 5 N is acting on an object. If object moves 5m in the direction opposite to the application of force, what is the work done?
Answer» A force of 5 N is acting on an object. If object moves 5m in the direction opposite to the application of force, what is the work done?

Discussion

969.	Simple definition of uniform velocity and uniform acceleration
Answer» Simple definition of uniform velocity and uniform acceleration

Discussion

970.	an object of mass 10kg is divided into two parts ,which are placed at distance d .if gravitational force of attraction is maximum between the parts ,then the ratio of the mass of both parts is
Answer» an object of mass 10kg is divided into two parts ,which are placed at distance d .if gravitational force of attraction is maximum between the parts ,then the ratio of the mass of both parts is

Discussion

971.	How much work is done when a body of mass m is raised to a height h above the ground ?
Answer» How much work is done when a body of mass m is raised to a height h above the ground ?

Discussion

972.	SI unit of frequency is
Answer» SI unit of frequency is

Discussion

973.	12. Nine person went to a hotel for taking their meals . Eight of them rupee 12 each over their meals and the ninth spent rupee 8 more than the average expenditure of all the nine . What was the total money spent by them ?
Answer» 12. Nine person went to a hotel for taking their meals . Eight of them rupee 12 each over their meals and the ninth spent rupee 8 more than the average expenditure of all the nine . What was the total money spent by them ?

Discussion

974.	A meter rule is supported at its centre. It is balanced by two weights, A and B. If A and B are placed at a distance 30 cm, and 60 cm from the centre of scale, find the weight of B. The weight of A is 50N.
Answer» A meter rule is supported at its centre. It is balanced by two weights, A and B. If A and B are placed at a distance 30 cm, and 60 cm from the centre of scale, find the weight of B. The weight of A is 50N.

Discussion

975.	In the circuit shown in fig.Would any of the bulb glow when the switch is in the 'OFF' position?What will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON' position?
Answer» In the circuit shown in fig. Would any of the bulb glow when the switch is in the 'OFF' position? What will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON' position?

Discussion

976.	What resistance must be connected to a 15 Ω resistance to provide an effective resistance of 6 Ω?
Answer» What resistance must be connected to a $15 Ω$ resistance to provide an effective resistance of $6 Ω$ ?

Discussion

977.	A closed compartment containing gas is moving with some acceleration in horizontal direction . Neglect effect of gravity . then the pressure in the compartment is a. same everywhere b. lower in front side c. lower in rear side d. lower in upper side
Answer» A closed compartment containing gas is moving with some acceleration in horizontal direction . Neglect effect of gravity . then the pressure in the compartment is a. same everywhere b. lower in front side c. lower in rear side d. lower in upper side

Discussion

978.	Which of the following relations hold good for 'R' and 'F', where 'R' is the radius of curvature of a spherical mirror and 'F' is the focal length of the mirror?
Answer» Which of the following relations hold good for 'R' and 'F', where 'R' is the radius of curvature of a spherical mirror and 'F' is the focal length of the mirror?

Discussion

979.	State and explain kepler's laws of planetary motion. Draw diagrams to illustrate these laws.
Answer» State and explain kepler's laws of planetary motion. Draw diagrams to illustrate these laws.

Discussion

980.	A person’s mass is measured on the moon and on the Earth. Which statement would be true?
Answer» A person’s mass is measured on the moon and on the Earth. Which statement would be true?

Discussion

981.

Match the words in the boxes with their explanations given below: rampageous subdural haemorrhage bellow blonde taut rambunctiousness grin critical confinement quivering shimmied a. This is the other word for trembling: b. This is used for smile: c. You call a person this if he/she has pale gold coloured hair: d. This is a quality which relates to high energy and noise: e. This is related to dancing or moving in a way that involves shaking your hips and shoulders: f. This is to express a tendency to show violent and wild behaviour often causing damage: g. We use it for a condition which is serious, uncertain and dangerous: h. This is a state in which one is forced to stay in a closed space: i. This is a medical condition involving bleeding in the brain: j. It is a loud, deep shout to show anger: k. This is a condition when the rope or leash is stretched tightly:

Answer»

Match
the words in the boxes with their explanations given below:

rampageous	subdural haemorrhage	bellow
blonde	taut	rambunctiousness
grin	critical	confinement
quivering	shimmied

a.
This is the other word for trembling:

b.
This is used for smile:

c.
You call a person this if he/she has pale gold coloured hair:

d.
This is a quality which relates to high energy and noise:

e.
This is related to dancing or moving in a way that involves shaking
your hips and shoulders:

f.
This is to express a tendency to show violent and wild behaviour
often causing damage:

g.
We use it for a condition which is serious, uncertain and dangerous:

h.
This is a state in which one is forced to stay in a closed space:

i.
This is a medical condition involving bleeding in the brain:

j.
It is a loud, deep shout to show anger:

k.
This is a condition when the rope or leash is stretched tightly:

Discussion

982.	Question 09.2 . A 5 m 60 cm high vertical pole casts a shadow 3 m 20 cm long. Find at the same time the height of a pole which casts a shadow 5 m long.
Answer» Question 09.2 . A 5 m 60 cm high vertical pole casts a shadow 3 m 20 cm long. Find at the same time the height of a pole which casts a shadow 5 m long.

Discussion

983.	Calculate the current flowing through a wire of resistance 7.5 Ω connected to a battery of potential difference 1.5 V.
Answer» Calculate the current flowing through a wire of resistance 7.5 Ω connected to a battery of potential difference 1.5 V.

Discussion

984.	A clock having marks Instead of numbers on its dial appears to indicate 4:35 when you through a plane mirror what is the correct time explain the anomaly
Answer» A clock having marks Instead of numbers on its dial appears to indicate 4:35 when you through a plane mirror what is the correct time explain the anomaly

Discussion

985.	What are the things that can be done by applying force?
Answer» What are the things that can be done by applying force?

Discussion

986.	The wavelength of a wave is 4 m and two waves pass through a point per second. Find the speed of the wave.
Answer» The wavelength of a wave is 4 m and two waves pass through a point per second. Find the speed of the wave.

Discussion

987.	Form pairs ‘A’ Groups ‘B’ Groups(i) X-rays (a) GMRT(ii) Optical Telescope (b) ISRO(iii) Indian radio (c) Hubble telescope(iv) Launching (d) Chandraartificial satellites
Answer» Form pairs ‘A’ Groups ‘B’ Groups (i) X-rays (a) GMRT (ii) Optical Telescope (b) ISRO (iii) Indian radio (c) Hubble telescope (iv) Launching (d) Chandra artificial satellites

Discussion

988.	A ball is allowed to fall from top of the tower takes t1 to fall first half and t2 in second half then t1+ t2 / t1 is
Answer» A ball is allowed to fall from top of the tower takes t1 to fall first half and t2 in second half then t1+ t2 / t1 is

Discussion

989.	ntA freely falling object falls through a height of h in nth second. What is the fall of height in the next second ?n ntA) h-gn ntB) hgn ntC) h+gn ntD) h/gn ntn
Answer» ntA freely falling object falls through a height of h in nth second. What is the fall of height in the next second ?n ntA) h-gn ntB) hgn ntC) h+gn ntD) h/gn ntn

Discussion

990.	A body starts from rest at t=0, the acceleration time graph is shown. The distance travelled by the body from t=4 s to t=8 s will be
Answer» A body starts from rest at $t = 0$ , the acceleration time graph is shown. The distance travelled by the body from $t = 4 s$ to $t = 8 s$ will be

Discussion

991.	On absorbing light of wavelength 3800 Å, bromine molecule undergoes dissociation and form atoms. The kinetic energy of one bromine atom assuming that one quantum of radiation is absorbed by each molecule would be (Bond energy of Br2 = 190 kJ/mol)
Answer» On absorbing light of wavelength 3800 Å, bromine molecule undergoes dissociation and form atoms. The kinetic energy of one bromine atom assuming that one quantum of radiation is absorbed by each molecule would be (Bond energy of Br2 = 190 kJ/mol)

Discussion

992.	Two charges 2 micro coulomb and -2 micro coulomb are placed at (-9.5,0,0)and (4.5,0,0)cm respectively. in an external field given by E=(9x10^6)r-^2NC^-1.find the potential energy of the system in the external field .
Answer» Two charges 2 micro coulomb and -2 micro coulomb are placed at (-9.5,0,0)and (4.5,0,0)cm respectively. in an external field given by E=(9x10^6)r-^2NC^-1.find the potential energy of the system in the external field .

Discussion

993.	A coin is thrown in a vertically upward direction with a velocity of 5m/s. If the acceleration of the coin during its motion is 10m/s2 in the downward direction, what is the height attained by the coin and how much time does it take to reach there?
Answer» A coin is thrown in a vertically upward direction with a velocity of $5 m / s$ . If the acceleration of the coin during its motion is $10 m / s^{2}$ in the downward direction, what is the height attained by the coin and how much time does it take to reach there?

Discussion

994.	A projectile having initial velocity 20 m/s making an angle 30 degree with vertical.When it makes 45 degree with vertical in upward journey ,then speed becomes
Answer» A projectile having initial velocity 20 m/s making an angle 30 degree with vertical.When it makes 45 degree with vertical in upward journey ,then speed becomes

Discussion

995.	At temperature T, the power related by a body Q watts. At the temperature 2T the power radiated by it will be
Answer» At temperature T, the power related by a body Q watts. At the temperature 2T the power radiated by it will be

Discussion

996.	A concave mirror has a focal length of 20 cm. The distance between the two positions of the object for which the image size is double the object size is :
Answer» A concave mirror has a focal length of $20 cm$ . The distance between the two positions of the object for which the image size is double the object size is :

Discussion

997.	The centre of mass of a solid hemisphere of radius 8 cm is x cm from the centre of the flat surface. Then value of x is ______.
Answer» The centre of mass of a solid hemisphere of radius $8 cm$ is $x cm$ from the centre of the flat surface. Then value of $x$ is ______.

Discussion

998.	Do all bodies have the same inertia? Explain it with an example.
Answer» Do all bodies have the same inertia? Explain it with an example.

Discussion

999.	why is an amemeter connected in series ina circuit and a voltmeter is connected in parallel in a circuit
Answer» why is an amemeter connected in series ina circuit and a voltmeter is connected in parallel in a circuit

Discussion

1000.	The brakes applied to a car produce an acceleration of 6m/s×s in the opposite direction to the motion. If the car takes 2s to stop after the application of brakes find the distance it travelled during this time.
Answer» The brakes applied to a car produce an acceleration of 6m/s×s in the opposite direction to the motion. If the car takes 2s to stop after the application of brakes find the distance it travelled during this time.

Discussion

Explore topic-wise InterviewSolutions in .

The position of a body moving along x-axis at time t is given by x = (t2-4t+6) m . The distance travelled by body in time interval t = 0 to t = 3 s is? - (1) 5 m (2) 7m (3) 4 m (4) 3 m

Why small focal length increases aberration??

A solid block of iron sinks in fluid A but floats in another liquid B. What can be inferred about the properties of the fluids?

A gun fires n bullets per minute, each of mass m. If the speed of the bullet is v, then the magnitude of force (in SI unit) of recoil is

length of a minute hand of a clock is 4.5 cm.Find the average velocity of the tip of minute's hand between 6 A.M. to 6.30 A.M. & 6 A.M. to 6.30 P.M.

Draw the V-T graph of an object with uniform acceleration. What does the area under that measure

Find out how these images are connected to each other.

What is the formula to find speed of sound if distance and time is given

A nichrome wire 1m long and 1mm^{2 }in cross section area draws 4 ampere at 2 volt .The resistivity of nichrome is____

A body of volume 100 cm3 weighs 5 kgf in air. It is completely immersed in a liquid of density 1.8 ×103 kg m−3. Find : (i) the upthrust due to liquid and (ii) the weight of the body in liquid. (iii) the upthrust on the body. State the assumption made in part (i).

A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is

The mass ,radius of cross section, length has experimental value of (0\cdot3\pm0\cdot003)g, (0\cdot5\pm0\cdot005)mm, (6\pm0\cdot06)cm respectively. Error in measurement of density of the material is

On account of melting of ice at the north pole the moment of inertia of spinning of earth - a)increases b)decreasas c)remains unchanged d)depends on the time

42.The density of a newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is R, then the radius of the planet would be ?

A car starting from rest accelerates at the rate f through a distance S, then continues at constant speed for time t and then decelerates at the rate f/2 to come to rest. If the total distance traversed is 15 S, then

A force of 5 N is acting on an object. If object moves 5m in the direction opposite to the application of force, what is the work done?

Simple definition of uniform velocity and uniform acceleration

an object of mass 10kg is divided into two parts ,which are placed at distance d .if gravitational force of attraction is maximum between the parts ,then the ratio of the mass of both parts is

How much work is done when a body of mass m is raised to a height h above the ground ?

SI unit of frequency is

12. Nine person went to a hotel for taking their meals . Eight of them rupee 12 each over their meals and the ninth spent rupee 8 more than the average expenditure of all the nine . What was the total money spent by them ?

A meter rule is supported at its centre. It is balanced by two weights, A and B. If A and B are placed at a distance 30 cm, and 60 cm from the centre of scale, find the weight of B. The weight of A is 50N.

In the circuit shown in fig.Would any of the bulb glow when the switch is in the 'OFF' position?What will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON' position?

What resistance must be connected to a 15 Ω resistance to provide an effective resistance of 6 Ω?

A closed compartment containing gas is moving with some acceleration in horizontal direction . Neglect effect of gravity . then the pressure in the compartment is a. same everywhere b. lower in front side c. lower in rear side d. lower in upper side

Which of the following relations hold good for 'R' and 'F', where 'R' is the radius of curvature of a spherical mirror and 'F' is the focal length of the mirror?

State and explain kepler's laws of planetary motion. Draw diagrams to illustrate these laws.

A person’s mass is measured on the moon and on the Earth. Which statement would be true?

Question 09.2 . A 5 m 60 cm high vertical pole casts a shadow 3 m 20 cm long. Find at the same time the height of a pole which casts a shadow 5 m long.

Calculate the current flowing through a wire of resistance 7.5 Ω connected to a battery of potential difference 1.5 V.

A clock having marks Instead of numbers on its dial appears to indicate 4:35 when you through a plane mirror what is the correct time explain the anomaly

What are the things that can be done by applying force?

The wavelength of a wave is 4 m and two waves pass through a point per second. Find the speed of the wave.

Form pairs ‘A’ Groups ‘B’ Groups(i) X-rays (a) GMRT(ii) Optical Telescope (b) ISRO(iii) Indian radio (c) Hubble telescope(iv) Launching (d) Chandraartificial satellites

A ball is allowed to fall from top of the tower takes t1 to fall first half and t2 in second half then t1+ t2 / t1 is

ntA freely falling object falls through a height of h in nth second. What is the fall of height in the next second ?n ntA) h-gn ntB) hgn ntC) h+gn ntD) h/gn ntn

A body starts from rest at t=0, the acceleration time graph is shown. The distance travelled by the body from t=4 s to t=8 s will be

On absorbing light of wavelength 3800 Å, bromine molecule undergoes dissociation and form atoms. The kinetic energy of one bromine atom assuming that one quantum of radiation is absorbed by each molecule would be (Bond energy of Br2 = 190 kJ/mol)

Two charges 2 micro coulomb and -2 micro coulomb are placed at (-9.5,0,0)and (4.5,0,0)cm respectively. in an external field given by E=(9x10^6)r-^2NC^-1.find the potential energy of the system in the external field .

A coin is thrown in a vertically upward direction with a velocity of 5m/s. If the acceleration of the coin during its motion is 10m/s2 in the downward direction, what is the height attained by the coin and how much time does it take to reach there?

A projectile having initial velocity 20 m/s making an angle 30 degree with vertical.When it makes 45 degree with vertical in upward journey ,then speed becomes

At temperature T, the power related by a body Q watts. At the temperature 2T the power radiated by it will be

A concave mirror has a focal length of 20 cm. The distance between the two positions of the object for which the image size is double the object size is :

The centre of mass of a solid hemisphere of radius 8 cm is x cm from the centre of the flat surface. Then value of x is ______.

Do all bodies have the same inertia? Explain it with an example.

why is an amemeter connected in series ina circuit and a voltmeter is connected in parallel in a circuit

The brakes applied to a car produce an acceleration of 6m/s×s in the opposite direction to the motion. If the car takes 2s to stop after the application of brakes find the distance it travelled during this time.