13232 + Interview Questions in Physics Page 7 InterviewSolution

301.	50.Why potassium has low density than Sodium
Answer» 50.Why potassium has low density than Sodium

Discussion

302.	Two particles execute SHM of same amplitude of 20 cm with same period along the same line about the same equilibrium position. The maximum distance between the two is 20 cm. Their phase difference in radians is
Answer» Two particles execute SHM of same amplitude of $20 cm$ with same period along the same line about the same equilibrium position. The maximum distance between the two is $20 cm$ . Their phase difference in radians is

Discussion

303.	Are there more devices except megaphone and stethoscope that are practicel application of multiple reflection of sound?
Answer» Are there more devices except megaphone and stethoscope that are practicel application of multiple reflection of sound?

Discussion

304.	The S.I. unit of force is
Answer» The S.I. unit of force is

Discussion

305.	25.What is the difference between seismograph and seismometer?
Answer» 25.What is the difference between seismograph and seismometer?

Discussion

306.	A ball of mass 0.5 kg slows down from a speed of 5ms-1 to 3ms-1.Calculate the change in kinetic energy of the ball.
Answer» A ball of mass 0.5 kg slows down from a speed of 5ms^-1to 3ms^-1.Calculate the change in kinetic energy of the ball.

Discussion

307.	7 capacitors each of capacitance 2 mF to be connected to obtain a capacitance of 10/11 mF. Which of the following combination is possible 5 in parallel, 2 in series 4 in parallel, 3 in series 3 in parallel, 4 in series 2 in parallel, 5 in series
Answer» 7 capacitors each of capacitance 2 mF to be connected to obtain a capacitance of 10/11 mF. Which of the following combination is possible 5 in parallel, 2 in series 4 in parallel, 3 in series 3 in parallel, 4 in series 2 in parallel, 5 in series

Discussion

308.	Unit of gravitational constant ‘G’ is?
Answer» Unit of gravitational constant ‘G’ is?

Discussion

309.	a particle of mass m is moving with a constant velocity parallel to the y axis if it at t=0 particle is at point A(2m,0) the angular momentum wrt the origin
Answer» a particle of mass m is moving with a constant velocity parallel to the y axis if it at t=0 particle is at point A(2m,0) the angular momentum wrt the origin

Discussion

310.	Differentiate between a cell and a battery.
Answer» Differentiate between a cell and a battery.

Discussion

311.	What is the pressure if a 20 N force is applied over an area of 2cm2?
Answer» What is the pressure if a 20 N force is applied over an area of ${2 c m}^{2}$ ?

Discussion

312.	M is mass of solid spare and r is radius of solid sphere find gravitational potential due to solid despair at on the surface of solid surface and at centre of solid surface and at a distance r by 2 from centre of solid surface and at a distance r from the surface outside the sphere
Answer» M is mass of solid spare and r is radius of solid sphere find gravitational potential due to solid despair at on the surface of solid surface and at centre of solid surface and at a distance r by 2 from centre of solid surface and at a distance r from the surface outside the sphere

Discussion

313.	The velocity of a body of mass 10 kg increases from 4 m/s to 8 m/s when a force acts on it for 2 s.(a) What is the momentum before the force acts?(b) What is the momentum after the force acts?(c) What is the gain in momentum per second?(d) What is the value of the force?
Answer» The velocity of a body of mass 10 kg increases from 4 m/s to 8 m/s when a force acts on it for 2 s. (a) What is the momentum before the force acts? (b) What is the momentum after the force acts? (c) What is the gain in momentum per second? (d) What is the value of the force?

Discussion

314.	If a body takes 6 minutes to cool from 800C to 700C, how long will it take to cool from 600C to 500C, if thesurrounding temperature is 250C?
Answer» If a body takes 6 minutes to cool from 80⁰C to 70⁰C, how long will it take to cool from 60⁰C to 50⁰C, if the surrounding temperature is 25⁰C?

Discussion

315.	When does a force perform work?
Answer» When does a force perform work?

Discussion

316.	A 3 cm long object is placed at 12 cm from a concave lens, perpendicular to its principal axis. The lens forms a virtual image whose size is 1.5 cm. Find the power of the lens.
Answer» A $3 cm$ long object is placed at $12 cm$ from a concave lens, perpendicular to its principal axis. The lens forms a virtual image whose size is $1.5 cm$ . Find the power of the lens.

Discussion

317.	What is the kinetic energy(E) of a body if it's momentum (M) is halved?
Answer» What is the kinetic energy(E) of a body if it's momentum (M) is halved?

Discussion

318.	Question 4What does the path of an object look like when it is in uniform motion?
Answer» Question 4 What does the path of an object look like when it is in uniform motion?

Discussion

319.	गाँव और शहर, दोनों जगहों पर चलने वाले मोहन के जीवन-संघर्ष में क्या फर्क है? चर्चा करें लिखें।
Answer» गाँव और शहर, दोनों जगहों पर चलने वाले मोहन के जीवन-संघर्ष में क्या फर्क है? चर्चा करें लिखें।

Discussion

320.	What is the relationship betweenacceleration and mass of a body?
Answer» What is the relationship betweenacceleration and mass of a body?

Discussion

321.	A particle is moving along a circle such that it completes one revolution in 40 sec.In 2 min 20 sec ratio \| displacement \| / distance ?
Answer» A particle is moving along a circle such that it completes one revolution in 40 sec.In 2 min 20 sec ratio \| displacement \| / distance ?

Discussion

322.	It takes 0.2 seconds to move from mean position to one end. What is the time period of pendulum
Answer» It takes 0.2 seconds to move from mean position to one end. What is the time period of pendulum

Discussion

323.	An object is placed in front of a concave mirror of focal length 0.15 meter produces a virtual image which is twice the size of object. The position of object with respect to mirror is
Answer» An object is placed in front of a concave mirror of focal length 0.15 meter produces a virtual image which is twice the size of object. The position of object with respect to mirror is

Discussion

324.	According to the Third Law of Motion, action and reaction
Answer» According to the Third Law of Motion, action and reaction

Discussion

325.	A paticle movs along a straigth line such that its displacement at any time t is given by S=t^3-6t^2+3t+4 meters.The velocity when accelaration is zero is:-
Answer» A paticle movs along a straigth line such that its displacement at any time t is given by S=t^3-6t^2+3t+4 meters.The velocity when accelaration is zero is:-

Discussion

326.	What is the factor on which the innertia of the body depend?
Answer» What is the factor on which the innertia of the body depend?

Discussion

327.	73. Two particle A and B are moving in two different cocentric and coplanar path find relative angular velocity of B with respect to A
Answer» 73. Two particle A and B are moving in two different cocentric and coplanar path find relative angular velocity of B with respect to A

Discussion

328.	13. The current i in steady state is.
Answer» 13. The current i in steady state is.

Discussion

329.	Question 1 What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?
Answer» Question 1 What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?

Discussion

330.	Define the following terms:a) Amplitudeb) Time period c) Frequency
Answer» Define the following terms: a) Amplitude b) Time period c) Frequency

Discussion

331.	Which of the following is/are true? (i) if object's acceleration is constant then it must move in a straight line (ii) if object's acceleration is zero, then its speed must remain constant (iii) if an object's speed remains constant then its acceleration must be zero
Answer» Which of the following is/are true? (i) if object's acceleration is constant then it must move in a straight line (ii) if object's acceleration is zero, then its speed must remain constant (iii) if an object's speed remains constant then its acceleration must be zero

331.

Which of the following is/are true? (i) if object's acceleration is constant then it must move in a straight line (ii) if object's acceleration is zero, then its speed must remain constant (iii) if an object's speed remains constant then its acceleration must be zero

Answer»

Which of the following is/are true?

(i) if object's acceleration is constant then it must move in a straight line

(ii) if object's acceleration is zero, then its speed must remain constant

(iii) if an object's speed remains constant then its acceleration must be zero

Discussion

332.	In the adjoining figure, if BC=a units, AC=b units, AB=c units and ∠CAB=120∘, then prove that a2 = b2 + c2 + bc.
Answer» In the adjoining figure, if $B C = a u n i t s, A C = b u n i t s, A B = c u n i t s$ and $∠ C A B = 120^{\circ}$ , then prove that $a^{2}$ = $b^{2}$ + $c^{2}$ + bc.

332.

In the adjoining figure, if BC=a units, AC=b units, AB=c units and ∠CAB=120∘, then prove that a2 = b2 + c2 + bc.

Answer»

In the adjoining figure, if $B C = a u n i t s, A C = b u n i t s, A B = c u n i t s$ and $∠ C A B = 120^{\circ}$ , then prove that $a^{2}$ = $b^{2}$ + $c^{2}$ + bc.

Discussion

333.	Two masses m1 and m2 collide with each other. Before the collision, the velocities are u1 and u2 respectively. After the collision, the velocities are v1 and v2 respectively. The total final momentum after collision is given by:
Answer» Two masses $m_{1}$ and $m_{2}$ collide with each other. Before the collision, the velocities are $u_{1}$ and $u_{2}$ respectively. After the collision, the velocities are $v_{1}$ and $v_{2}$ respectively. The total final momentum after collision is given by:

Discussion

334.	From the magnitude of impulse, it is possible to find the change in linear momentum because
Answer» From the magnitude of impulse, it is possible to find the change in linear momentum because

Discussion

335.	What Force should be applied on an object of mass 50kg .to make it accelerate upto50 kg /hr
Answer» What Force should be applied on an object of mass 50kg .to make it accelerate upto50 kg /hr

Discussion

336.	An athlete starts running from the corner of a rectangular park and ran at the edge of the park till he reached the starting point. Which of the following statement(s) will be true in this case?
Answer» An athlete starts running from the corner of a rectangular park and ran at the edge of the park till he reached the starting point. Which of the following statement(s) will be true in this case?

Discussion

337.	Find the approximate diameter of the image of the moon formed by a spherical concave mirror of focal length 7.6 m. The diameter of the moon is 3450 km and the dis†an ce between the earth and the moon is 3.8 × 10(power 5 )^{} km.
Answer» Find the approximate diameter of the image of the moon formed by a spherical concave mirror of focal length 7.6 m. The diameter of the moon is 3450 km and the dis†an ce between the earth and the moon is 3.8 × 10(power 5 )^{} km.

Discussion

338.	For the graph given below choose the correct option: TableATableBa)LineAi)Accelerated Motionb)LineBii)Constant velocity(high magnitude)c)CurveCiii)At restd)LineEiv)Constant Velocity(low magnitude)
Answer» For the graph given below choose the correct option: $\begin{matrix} T a b l e A & T a b l e B a) L i n e A & i) A c c e l e r a t e d M o t i o n b) L i n e B & i i) C o n s t a n t v e l o c i t y (h i g h m a g n i t u d e) c) C u r v e C & i i i) A t r e s t d) L i n e E & i v) C o n s t a n t V e l o c i t y (l o w m a g n i t u d e) \end{matrix}$

338.

For the graph given below choose the correct option: TableATableBa)LineAi)Accelerated Motionb)LineBii)Constant velocity(high magnitude)c)CurveCiii)At restd)LineEiv)Constant Velocity(low magnitude)

Answer»

For the graph given below choose the correct option:

$\begin{matrix} T a b l e A & T a b l e B a) L i n e A & i) A c c e l e r a t e d M o t i o n b) L i n e B & i i) C o n s t a n t v e l o c i t y (h i g h m a g n i t u d e) c) C u r v e C & i i i) A t r e s t d) L i n e E & i v) C o n s t a n t V e l o c i t y (l o w m a g n i t u d e) \end{matrix}$

Discussion

339.	73 XY2(g) dissociates as XY and Y. initial pressure of XY2 Is 600 mm hg. the total pressure at equilibrium is 800 mm hg. assuming volume of the system to remain constant, the value of kp is??
Answer» 73 XY2(g) dissociates as XY and Y. initial pressure of XY2 Is 600 mm hg. the total pressure at equilibrium is 800 mm hg. assuming volume of the system to remain constant, the value of kp is??

Discussion

340.	The equation y=A cos^2(wt-kx) represents a wave motion with1 Amplitude A ,frequency w/2π2 Amplitude A/2 ,frequency w/π3 Amplitude 2A ,frequency w/4π4 none of these
Answer» The equation y=A cos^2(wt-kx) represents a wave motion with 1 Amplitude A ,frequency w/2π 2 Amplitude A/2 ,frequency w/π 3 Amplitude 2A ,frequency w/4π 4 none of these

Discussion

341.	A given piece of wire of length L radius r and resistance R is stretched uniformly to a wire of radius r2. The new resistance is:
Answer» A given piece of wire of length L radius r and resistance R is stretched uniformly to a wire of radius $\frac{r}{2}$ . The new resistance is:

Discussion

342.	Which of the following figures represents the uniform motion of a moving object correctly?
Answer» Which of the following figures represents the uniform motion of a moving object correctly?

Discussion

343.	In an experiment to determine the densities, four solids A, B, C and D are immersed in a liquid contained in a measuring cylinder, one by one. The volumes of water displaced by the solids A, B, C and D are 100 cm3, 100 cm3, 80 cm3 and 80 cm3, respectively. When weighed in air, the masses of solids A, B, C, and D were found to be 80g, 100g, 100g and 80g, respectively. The two solids having identical densities are :(1) A and C(2) B and D(3) C and D(4) A and D
Answer» In an experiment to determine the densities, four solids A, B, C and D are immersed in a liquid contained in a measuring cylinder, one by one. The volumes of water displaced by the solids A, B, C and D are 100 cm³, 100 cm³, 80 cm³and 80 cm³, respectively. When weighed in air, the masses of solids A, B, C, and D were found to be 80g, 100g, 100g and 80g, respectively. The two solids having identical densities are : (1) A and C (2) B and D (3) C and D (4) A and D

Discussion

344.	89.A particle moves xerox in time to according to equationx=1÷ (t+5) the acceleration of particle is proportionamed to
Answer» 89.A particle moves xerox in time to according to equationx=1÷ (t+5) the acceleration of particle is proportionamed to

Discussion

345.	Ratio of angular speed of second's hand to hourhand of a standard clock isS.0(4) 180(1) 12(2) 60 0w.s(3) 720
Answer» Ratio of angular speed of second's hand to hourhand of a standard clock isS.0(4) 180(1) 12(2) 60 0w.s(3) 720

Discussion

346.	why gravitation forcr does not depend upon medium between the two objects?
Answer» why gravitation forcr does not depend upon medium between the two objects?

Discussion

347.	does the electrons jump from one atom to another during the flow of electrons(electric current)?
Answer» does the electrons jump from one atom to another during the flow of electrons(electric current)?

Discussion

348.	Derive the expression for kinetic energy.
Answer» Derive the expression for kinetic energy.

Discussion

349.	The density of a solid metal sphere is determined by measuring its mass and its diameter, the maximum error in the density of the sphere is (x100)%. If the relative errors in measuring the mass and the diameter are 6.0 % and 1.5 % respectively, the value of x is
Answer» The density of a solid metal sphere is determined by measuring its mass and its diameter, the maximum error in the density of the sphere is $(\frac{x}{100})$ %. If the relative errors in measuring the mass and the diameter are $6.0 %$ and $1.5 %$ respectively, the value of $x$ is

Discussion

350.	Draw the graph of total Energy vs height of a ball dropped from a height of 'h' m from the ground.Mass of ball = 'm' kg and acceleration due to gravity = 'g' ms−2.
Answer» Draw the graph of total Energy vs height of a ball dropped from a height of 'h' m from the ground. Mass of ball = 'm' kg and acceleration due to gravity = 'g' ms $^{- 2}$ .

Discussion

Explore topic-wise InterviewSolutions in .

50.Why potassium has low density than Sodium

Two particles execute SHM of same amplitude of 20 cm with same period along the same line about the same equilibrium position. The maximum distance between the two is 20 cm. Their phase difference in radians is

Are there more devices except megaphone and stethoscope that are practicel application of multiple reflection of sound?

The S.I. unit of force is

25.What is the difference between seismograph and seismometer?

A ball of mass 0.5 kg slows down from a speed of 5ms-1 to 3ms-1.Calculate the change in kinetic energy of the ball.

7 capacitors each of capacitance 2 mF to be connected to obtain a capacitance of 10/11 mF. Which of the following combination is possible 5 in parallel, 2 in series 4 in parallel, 3 in series 3 in parallel, 4 in series 2 in parallel, 5 in series

Unit of gravitational constant ‘G’ is?

a particle of mass m is moving with a constant velocity parallel to the y axis if it at t=0 particle is at point A(2m,0) the angular momentum wrt the origin

Differentiate between a cell and a battery.

What is the pressure if a 20 N force is applied over an area of 2cm2?

M is mass of solid spare and r is radius of solid sphere find gravitational potential due to solid despair at on the surface of solid surface and at centre of solid surface and at a distance r by 2 from centre of solid surface and at a distance r from the surface outside the sphere

The velocity of a body of mass 10 kg increases from 4 m/s to 8 m/s when a force acts on it for 2 s.(a) What is the momentum before the force acts?(b) What is the momentum after the force acts?(c) What is the gain in momentum per second?​(d) What is the value of the force?

If a body takes 6 minutes to cool from 800C to 700C, how long will it take to cool from 600C to 500C, if thesurrounding temperature is 250C?

When does a force perform work?

A 3 cm long object is placed at 12 cm from a concave lens, perpendicular to its principal axis. The lens forms a virtual image whose size is 1.5 cm. Find the power of the lens.

What is the kinetic energy(E) of a body if it's momentum (M) is halved?

Question 4What does the path of an object look like when it is in uniform motion?

गाँव और शहर, दोनों जगहों पर चलने वाले मोहन के जीवन-संघर्ष में क्या फर्क है? चर्चा करें लिखें।

What is the relationship betweenacceleration and mass of a body?

A particle is moving along a circle such that it completes one revolution in 40 sec.In 2 min 20 sec ratio | displacement | / distance ?

It takes 0.2 seconds to move from mean position to one end. What is the time period of pendulum

An object is placed in front of a concave mirror of focal length 0.15 meter produces a virtual image which is twice the size of object. The position of object with respect to mirror is

According to the Third Law of Motion, action and reaction

A paticle movs along a straigth line such that its displacement at any time t is given by S=t^3-6t^2+3t+4 meters.The velocity when accelaration is zero is:-

What is the factor on which the innertia of the body depend?

73. Two particle A and B are moving in two different cocentric and coplanar path find relative angular velocity of B with respect to A

13. The current i in steady state is.

Question 1 What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?

Define the following terms:a) Amplitudeb) Time period c) Frequency

Which of the following is/are true? (i) if object's acceleration is constant then it must move in a straight line (ii) if object's acceleration is zero, then its speed must remain constant (iii) if an object's speed remains constant then its acceleration must be zero

In the adjoining figure, if BC=a units, AC=b units, AB=c units and ∠CAB=120∘, then prove that a2 = b2 + c2 + bc.

Two masses m1 and m2 collide with each other. Before the collision, the velocities are u1 and u2 respectively. After the collision, the velocities are v1 and v2 respectively. The total final momentum after collision is given by:

From the magnitude of impulse, it is possible to find the change in linear momentum because

What Force should be applied on an object of mass 50kg .to make it accelerate upto50 kg /hr

An athlete starts running from the corner of a rectangular park and ran at the edge of the park till he reached the starting point. Which of the following statement(s) will be true in this case?

Find the approximate diameter of the image of the moon formed by a spherical concave mirror of focal length 7.6 m. The diameter of the moon is 3450 km and the dis†an ce between the earth and the moon is 3.8 × 10(power 5 )^{} km.

For the graph given below choose the correct option: TableATableBa)LineAi)Accelerated Motionb)LineBii)Constant velocity(high magnitude)c)CurveCiii)At restd)LineEiv)Constant Velocity(low magnitude)

73 XY2(g) dissociates as XY and Y. initial pressure of XY2 Is 600 mm hg. the total pressure at equilibrium is 800 mm hg. assuming volume of the system to remain constant, the value of kp is??

The equation y=A cos^2(wt-kx) represents a wave motion with1 Amplitude A ,frequency w/2π2 Amplitude A/2 ,frequency w/π3 Amplitude 2A ,frequency w/4π4 none of these

A given piece of wire of length L radius r and resistance R is stretched uniformly to a wire of radius r2. The new resistance is:

Which of the following figures represents the uniform motion of a moving object correctly?

89.A particle moves xerox in time to according to equationx=1÷ (t+5) the acceleration of particle is proportionamed to

Ratio of angular speed of second's hand to hourhand of a standard clock isS.0(4) 180(1) 12(2) 60 0w.s(3) 720

why gravitation forcr does not depend upon medium between the two objects?

does the electrons jump from one atom to another during the flow of electrons(electric current)?

Derive the expression for kinetic energy.

The density of a solid metal sphere is determined by measuring its mass and its diameter, the maximum error in the density of the sphere is (x100)%. If the relative errors in measuring the mass and the diameter are 6.0 % and 1.5 % respectively, the value of x is

Draw the graph of total Energy vs height of a ball dropped from a height of 'h' m from the ground.Mass of ball = 'm' kg and acceleration due to gravity = 'g' ms−2.

The velocity of a body of mass 10 kg increases from 4 m/s to 8 m/s when a force acts on it for 2 s.(a) What is the momentum before the force acts?(b) What is the momentum after the force acts?(c) What is the gain in momentum per second?(d) What is the value of the force?