13232 + Interview Questions in Physics Page 54 InterviewSolution

2651.	Which of the following screams?
Answer» Which of the following screams?

Discussion

2652.	Name the two qunatities, the slope of whose graph gives : (a) speed, and (b) acceleration
Answer» Name the two qunatities, the slope of whose graph gives : (a) speed, and (b) acceleration

2652.

Name the two qunatities, the slope of whose graph gives : (a) speed, and (b) acceleration

Answer»

Name the two qunatities, the slope of whose graph gives :

(a) speed, and

(b) acceleration

Discussion

2653.	the radius of 5 bohr orbit in hydrogen atomis [rnot is radius of 1st orbit of H atom]
Answer» the radius of 5 bohr orbit in hydrogen atomis [rnot is radius of 1st orbit of H atom]

Discussion

2654.	The kinetic energies of a planet in an elliptical orbit about the sun at positions A, B and C are KA, KB and KC respectively. AC is the major axis and SB is perpendicular to AC at the position of the sun S as shown in the figure with SA<SB. Then,
Answer» The kinetic energies of a planet in an elliptical orbit about the sun at positions $A$ , $B$ and $C$ are $K_{A}$ , $K_{B}$ and $K_{C}$ respectively. $A C$ is the major axis and $S B$ is perpendicular to $A C$ at the position of the sun $S$ as shown in the figure with $S A < S B$ . Then,

Discussion

2655.	A sofa, ABCD, is placed on a slippery surface. Two forces of 5 N are applied on AD and CD. Tap on the direction in which the sofa will move.
Answer» A sofa, ABCD, is placed on a slippery surface. Two forces of 5 N are applied on AD and CD. Tap on the direction in which the sofa will move.

Discussion

2656.	The conscience of the speaker pricks her as she has ______________. (i) been careless (ii) been ignorant (iii) been fun loving (iv) been rude
Answer» The conscience of the speaker pricks her as she has ______________. (i) been careless (ii) been ignorant (iii) been fun loving (iv) been rude

2656.

The conscience of the speaker pricks her as she has ______________. (i) been careless (ii) been ignorant (iii) been fun loving (iv) been rude

Answer»

The
conscience of the speaker pricks her as she has ______________.

(i) been
careless

(ii) been
ignorant

(iii) been
fun loving

(iv) been
rude

Discussion

2657.	23. The velocity (v) of a particle moving along x-axisvaries with its position x as shown in figure. Theacceleration (a) of particle varies with position (x) ass, itsht is(sju)en to.0()x(1) a2 = x + 3(2) a 2x2 +4(3) 2a 3x + 5(4) a 4x- 8
Answer» 23. The velocity (v) of a particle moving along x-axis varies with its position x as shown in figure. The acceleration (a) of particle varies with position (x) as s, its ht is (sju) en to .0 ()x (1) a2 = x + 3 (2) a 2x2 +4 (3) 2a 3x + 5 (4) a 4x- 8

Discussion

2658.	Two simple pendulums A and B have equal length, but their bobs weigh 50 gf and 100 gf respectively. What would be the ratio of their time periods ? Give reason for your answer.
Answer» Two simple pendulums A and B have equal length, but their bobs weigh 50 gf and 100 gf respectively. What would be the ratio of their time periods ? Give reason for your answer.

Discussion

2659.	A PSC beam, 200 mm wide and 300 mm deep, is used over an effective span of 6 m to support an imposed load of 4 kN/m. The density of concrete is 24kN/m3. At the quarter span section of the beam , the magnitude of eccentric prestressing force located 100 mm from the bottom of beam which would nullify the bottom fibre stress due to loading is ________kN.183.6
Answer» A PSC beam, 200 mm wide and 300 mm deep, is used over an effective span of 6 m to support an imposed load of 4 kN/m. The density of concrete is $24 k N / m^{3}$ . At the quarter span section of the beam , the magnitude of eccentric prestressing force located 100 mm from the bottom of beam which would nullify the bottom fibre stress due to loading is ________kN. 183.6

Discussion

2660.	if a copper wire is streched to make it 0.1% longer, then what is the percentage change in its resistance ?
Answer» if a copper wire is streched to make it 0.1% longer, then what is the percentage change in its resistance ?

Discussion

2661.	A force of 50N produces an acceleration of 10m/s2on a body of mass m1 and an acceleration of 20m/s2 on a body of mass m2. Find the acceleration produced by the same force if both the bodies were tied together.
Answer» A force of 50N produces an acceleration of 10m/s²on a body of mass m₁ and an acceleration of 20m/s² on a body of mass m_2.Find the acceleration produced by the same force if both the bodies were tied together.

Discussion

2662.	Under what conditions can a body travel a certain distance and yet its resultant displacement be zero?
Answer» Under what conditions can a body travel a certain distance and yet its resultant displacement be zero?

Discussion

2663.	A boy is sitting on a merry-go-round which is moving with a constant speed. This means that the boy is
Answer» A boy is sitting on a merry-go-round which is moving with a constant speed. This means that the boy is

Discussion

2664.	Body A of density (ρA) is floating in the water. When another body B having density (ρB=1500 kg m−3) and same dimensions is placed on body A, then the system just sinks in the water. What fraction of body A was originally immersed in the water? The density of water is ρw=1000 kg m−3. 0.5
Answer» Body A of density $(ρ_{A})$ is floating in the water. When another body B having density $(ρ_{B} = 1500 k g m^{- 3})$ and same dimensions is placed on body A, then the system just sinks in the water. What fraction of body A was originally immersed in the water? The density of water is $ρ_{w} = 1000 k g m^{- 3}$ . 0.5

Discussion

2665.	Which property of sound leads of the formation of echoes ?
Answer» Which property of sound leads of the formation of echoes ?

Discussion

2666.	लेखक ने अपने दृष्टिकोण से सभ्यता और संस्कृति की एक परिभाषा दी है। आप सभ्यता और संस्कृति के बारे में क्या सोचते हैं, लिखिए।
Answer» लेखक ने अपने दृष्टिकोण से सभ्यता और संस्कृति की एक परिभाषा दी है। आप सभ्यता और संस्कृति के बारे में क्या सोचते हैं, लिखिए।

Discussion

2667.	When a metal wire elongates by hanging a load on it, the gravitational potential energy is decreased
Answer» When a metal wire elongates by hanging a load on it, the gravitational potential energy is decreased

Discussion

2668.	Question 1Name two safety measures commonly used in electric circuits and appliances.
Answer» Question 1 Name two safety measures commonly used in electric circuits and appliances.

Discussion

2669.	In a cyclic process shown in the figure an idealgas is adiabatically taken firm B to A, the work done on the gas during the process B ⟶ A is 30 J, when the gas is taken from A → B theheat absorbed by the gas is 20 J. The change in internal energy of the gas inthe process A ⟶ B is
Answer» In a cyclic process shown in the figure an ideal gas is adiabatically taken firm B to A, the work done on the gas during the process B ⟶ A is 30 J, when the gas is taken from A → B the heat absorbed by the gas is 20 J. The change in internal energy of the gas in the process A ⟶ B is

2669.

In a cyclic process shown in the figure an idealgas is adiabatically taken firm B to A, the work done on the gas during the process B ⟶ A is 30 J, when the gas is taken from A → B theheat absorbed by the gas is 20 J. The change in internal energy of the gas inthe process A ⟶ B is

Answer»

In a cyclic process shown in the figure an ideal
gas is adiabatically taken firm B to A, the work done on the gas during the process B ⟶ A is 30 J, when the gas is taken from A → B the
heat absorbed by the gas is 20 J. The change in internal energy of the gas in
the process A ⟶ B is

Discussion

2670.	The average specific gravity of coarse aggregate varies from :
Answer» The average specific gravity of coarse aggregate varies from :

Discussion

2671.	Let assume two car A and B. Car A has more height than car B. if they both take a very sharp turn whihch car has higher chances of falling down. why
Answer» Let assume two car A and B. Car A has more height than car B. if they both take a very sharp turn whihch car has higher chances of falling down. why

Discussion

2672.	Sound travels in air : (a) if particles of medium travel from one place to another (b) if there is no moisture in the atmosphere (c) if disturbance moves (d) if both, particles as well as disturbance move from one place to another
Answer» Sound travels in air : (a) if particles of medium travel from one place to another (b) if there is no moisture in the atmosphere (c) if disturbance moves (d) if both, particles as well as disturbance move from one place to another

2672.

Sound travels in air : (a) if particles of medium travel from one place to another (b) if there is no moisture in the atmosphere (c) if disturbance moves (d) if both, particles as well as disturbance move from one place to another

Answer»

Sound travels in air :

(a) if particles of medium travel from one place to another

(b) if there is no moisture in the atmosphere

(c) if disturbance moves

(d) if both, particles as well as disturbance move from one place to another

Discussion

2673.	30.The horizontal distance travelled by a bullet fired at 45 degree is 360 m.If it is fired from a lorry moving in the direction of bullet with the uniform velocity 18 km per hour and with same elevation, what is the horizontal distance travelled by the bullet?
Answer» 30.The horizontal distance travelled by a bullet fired at 45 degree is 360 m.If it is fired from a lorry moving in the direction of bullet with the uniform velocity 18 km per hour and with same elevation, what is the horizontal distance travelled by the bullet?

Discussion

2674.	Write four uses of echo which includes its uses in Sonar and Radar
Answer» Write four uses of echo which includes its uses in Sonar and Radar

Discussion

2675.	What happens to the potential energy of an object, if its mass is doubled and its lifted height is halved from its initial state?
Answer» What happens to the potential energy of an object, if its mass is doubled and its lifted height is halved from its initial state?

Discussion

2676.	A body is moving with variable acceleration (a)along a straight line.The average acceleration of body in time interval t1 to t2 is 1)a(t2+ t1)/2 2)a(t2-t1)/
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 1)a(t2+ t1)/2 2)a(t2-t1)/

Discussion

2677.	The work done by heart every beat is 1 J. If heart‟s power in a patient was found to be 1.3 W, find number of times, his heart is beating in one minute.
Answer» The work done by heart every beat is 1 J. If heart‟s power in a patient was found to be 1.3 W, find number of times, his heart is beating in one minute.

Discussion

2678.	How far will a jeep travel in 2 hours at 20 m/s?
Answer» How far will a jeep travel in 2 hours at 20 m/s?

Discussion

2679.	A body mass 6kg is acted upon by a cons†an t force \overrightarrow f=(2i-3j)N. If its initial velocity at t=0 is \overrightarrow v= (-3i+4j)m/s, then the time at which its velocity will be along the x axis is (1)10s (2)6s (3)8s (4)never
Answer» A body mass 6kg is acted upon by a cons†an t force \overrightarrow f=(2i-3j)N. If its initial velocity at t=0 is \overrightarrow v= (-3i+4j)m/s, then the time at which its velocity will be along the x axis is (1)10s (2)6s (3)8s (4)never

Discussion

2680.	An ant travels a distance of 8cm from P to Q and then moves a distance of 6cm at right angles to PQ. Find its resultant displacement.
Answer» An ant travels a distance of $8 c m$ from P to Q and then moves a distance of $6 c m$ at right angles to PQ. Find its resultant displacement.

Discussion

2681.	A mass of 5 kg is suspended by a rope of length 2 m from a ceiling. A force of 50N in the horizontal direction is applied at the mid-point of the rope. The angle made by the rope with the vertical is equilibrium is:-
Answer» A mass of 5 kg is suspended by a rope of length 2 m from a ceiling. A force of 50N in the horizontal direction is applied at the mid-point of the rope. The angle made by the rope with the vertical is equilibrium is:-

Discussion

2682.	A longitudinal wave travels at a speed of 0.3 m s−1 and the frequency of wave is 20 Hz. Find the separation between the two consecutive compressions.
Answer» A longitudinal wave travels at a speed of 0.3 m $s^{-} 1$ and the frequency of wave is 20 Hz. Find the separation between the two consecutive compressions.

Discussion

2683.	A ball weighs 80g in air, 60g in water and 50g in liquid. If the density of water is 1g/cm^3 , find the density of the liquid.
Answer» A ball weighs 80g in air, 60g in water and 50g in liquid. If the density of water is 1g/cm^3 , find the density of the liquid.

Discussion

2684.	21.n a circuit a metallic wire is connected in series with a battery and an ammeter.if another wire(same metal,same length and cross sectional area )is connected in parallel to the metallic wire , the current in ammeter will be: A)halved B) doubled C)four times D) same
Answer» 21.n a circuit a metallic wire is connected in series with a battery and an ammeter.if another wire(same metal,same length and cross sectional area )is connected in parallel to the metallic wire , the current in ammeter will be: A)halved B) doubled C)four times D) same

Discussion

2685.	a piece of sliver has a resistance of 1 ohm. What will be the resistance of a constant and wire of one third length and one half diameter if the specific resistance of constantan is 30 times that of silver?
Answer» _{a piece of sliver has a resistance of 1 ohm. What will be the resistance of a constant and wire of one third length and one half diameter if the specific resistance of constantan is 30 times that of silver?}

Discussion

2686.	In 1.0 s, a particle goes from point A to point B, moving in asemicircle ofradiua 1 m. The magnitude of the average velocity
Answer» In 1.0 s, a particle goes from point A to point B, moving in asemicircle ofradiua 1 m. The magnitude of the average velocity

Discussion

2687.	A wire of resistance 4 Ω is stretched to twice its original length. The resistance of stretched wire would be -
Answer» A wire of resistance $4 Ω$ is stretched to twice its original length. The resistance of stretched wire would be -

Discussion

2688.	There are two persons . One rahul and second rakesh . Suppose rahul's velocity is greater rakesh then colloison take place then then the linear momentumbecame 0 and force is exerted .Then force is exerted on rahul by rakesh or rakesh by rahul or both of them exerted force on each other?
Answer» There are two persons . One rahul and second rakesh . Suppose rahul's velocity is greater rakesh then colloison take place then then the linear momentumbecame 0 and force is exerted .Then force is exerted on rahul by rakesh or rakesh by rahul or both of them exerted force on each other?

Discussion

2689.	Question 17The velocity of a body moving in a straight line is increased by applying a constant force F. for some distance in the direction of the motion. Prove that the increase in the kinetic energy of the body is equal to the work done by the force on the body.
Answer» Question 17 The velocity of a body moving in a straight line is increased by applying a constant force F. for some distance in the direction of the motion. Prove that the increase in the kinetic energy of the body is equal to the work done by the force on the body.

Discussion

2690.	4. calaculate the temperature at which o2 1atmospheric pressure has the same( ums) speed as that of n2 at NTP
Answer» 4. calaculate the temperature at which o2 1atmospheric pressure has the same( ums) speed as that of n2 at NTP

Discussion

2691.	Distinguish between acceleration and retardation.
Answer» Distinguish between acceleration and retardation.

Discussion

2692.	Brakes are applied to a truck to produce an acceleration of –10 ms−2. If the truck takes 5 s to stop after applying the brakes, then find the distance covered by the truck before coming to rest.
Answer» Brakes are applied to a truck to produce an acceleration of $- 10 m s^{- 2}$ . If the truck takes $5 s$ to stop after applying the brakes, then find the distance covered by the truck before coming to rest.

Discussion

2693.	85.Apparent weight of body at the equator of planet is half of that at poles. if the peripheral velocity of a point on the equator of this planet is v then escape velocity of Polar particle will be (In terms of v)
Answer» 85.Apparent weight of body at the equator of planet is half of that at poles. if the peripheral velocity of a point on the equator of this planet is v then escape velocity of Polar particle will be (In terms of v)

Discussion

2694.	21. What mass of water will be formed from 8 g of hydrogen and 20 g of oxygen?
Answer» 21. What mass of water will be formed from 8 g of hydrogen and 20 g of oxygen?

Discussion

2695.	Which of the following is the largest cell?
Answer» Which of the following is the largest cell?

Discussion

2696.	The diameter of the sun is 1.4×109 m and its distance from the earth is 1011 m. The diameter of its image, formed by a concave mirror of focal length 2 m will be :
Answer» The diameter of the sun is $1.4 \times 10^{9} m$ and its distance from the earth is $10^{11} m$ . The diameter of its image, formed by a concave mirror of focal length $2 m$ will be :

Discussion

2697.	Universal law of gravitation does not explain
Answer» Universal law of gravitation does not explain

Discussion

2698.	A pendulum is suspended from a rigid support with the bottom end of its bob at a height of 20 cm and the point of suspension at 185 cm. If the radius of the bob is 211th of its effective length. Calculate and express the radius of the bob in metre.0.2538
Answer» A pendulum is suspended from a rigid support with the bottom end of its bob at a height of $20 c m$ and the point of suspension at $185 c m$ . If the radius of the bob is $\frac{2}{11}$ th of its effective length. Calculate and express the radius of the bob in metre. 0.2538

Discussion

2699.	If a copper wire is stretched to make its radius decreases by 0.1% then the percentage increase in resistance is nearly
Answer» If a copper wire is stretched to make its radius decreases by 0.1% then the percentage increase in resistance is nearly

Discussion

2700.	If the kinetic energy of a body increases by 300%,A,by what percent shall the linear momentum of thebody increase?
Answer» If the kinetic energy of a body increases by 300%,A,by what percent shall the linear momentum of thebody increase?

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following screams?

Name the two qunatities, the slope of whose graph gives : (a) speed, and (b) acceleration

the radius of 5 bohr orbit in hydrogen atomis [rnot is radius of 1st orbit of H atom]

The kinetic energies of a planet in an elliptical orbit about the sun at positions A, B and C are KA, KB and KC respectively. AC is the major axis and SB is perpendicular to AC at the position of the sun S as shown in the figure with SA&lt;SB. Then,

A sofa, ABCD, is placed on a slippery surface. Two forces of 5 N are applied on AD and CD. Tap on the direction in which the sofa will move.

The conscience of the speaker pricks her as she has ______________. (i) been careless (ii) been ignorant (iii) been fun loving (iv) been rude

23. The velocity (v) of a particle moving along x-axisvaries with its position x as shown in figure. Theacceleration (a) of particle varies with position (x) ass, itsht is(sju)en to.0()x(1) a2 = x + 3(2) a 2x2 +4(3) 2a 3x + 5(4) a 4x- 8

Two simple pendulums A and B have equal length, but their bobs weigh 50 gf and 100 gf respectively. What would be the ratio of their time periods ? Give reason for your answer.

if a copper wire is streched to make it 0.1% longer, then what is the percentage change in its resistance ?

A force of 50N produces an acceleration of 10m/s2on a body of mass m1 and an acceleration of 20m/s2 on a body of mass m2. Find the acceleration produced by the same force if both the bodies were tied together.

Under what conditions can a body travel a certain distance and yet its resultant displacement be zero?

A boy is sitting on a merry-go-round which is moving with a constant speed. This means that the boy is

Body A of density (ρA) is floating in the water. When another body B having density (ρB=1500 kg m−3) and same dimensions is placed on body A, then the system just sinks in the water. What fraction of body A was originally immersed in the water? The density of water is ρw=1000 kg m−3. 0.5

Which property of sound leads of the formation of echoes ?

When a metal wire elongates by hanging a load on it, the gravitational potential energy is decreased

Question 1Name two safety measures commonly used in electric circuits and appliances.

In a cyclic process shown in the figure an idealgas is adiabatically taken firm B to A, the work done on the gas during the process B ⟶ A is 30 J, when the gas is taken from A → B theheat absorbed by the gas is 20 J. The change in internal energy of the gas inthe process A ⟶ B is

The average specific gravity of coarse aggregate varies from :

Let assume two car A and B. Car A has more height than car B. if they both take a very sharp turn whihch car has higher chances of falling down. why

Sound travels in air : (a) if particles of medium travel from one place to another (b) if there is no moisture in the atmosphere (c) if disturbance moves (d) if both, particles as well as disturbance move from one place to another

30.The horizontal distance travelled by a bullet fired at 45 degree is 360 m.If it is fired from a lorry moving in the direction of bullet with the uniform velocity 18 km per hour and with same elevation, what is the horizontal distance travelled by the bullet?

Write four uses of echo which includes its uses in Sonar and Radar

What happens to the potential energy of an object, if its mass is doubled and its lifted height is halved from its initial state?

A body is moving with variable acceleration (a)along a straight line.The average acceleration of body in time interval t1 to t2 is 1)a(t2+ t1)/2 2)a(t2-t1)/

The work done by heart every beat is 1 J. If heart‟s power in a patient was found to be 1.3 W, find number of times, his heart is beating in one minute.

How far will a jeep travel in 2 hours at 20 m/s?

A body mass 6kg is acted upon by a cons†an t force \overrightarrow f=(2i-3j)N. If its initial velocity at t=0 is \overrightarrow v= (-3i+4j)m/s, then the time at which its velocity will be along the x axis is (1)10s (2)6s (3)8s (4)never

An ant travels a distance of 8cm from P to Q and then moves a distance of 6cm at right angles to PQ. Find its resultant displacement.

A mass of 5 kg is suspended by a rope of length 2 m from a ceiling. A force of 50N in the horizontal direction is applied at the mid-point of the rope. The angle made by the rope with the vertical is equilibrium is:-

A longitudinal wave travels at a speed of 0.3 m s−1 and the frequency of wave is 20 Hz. Find the separation between the two consecutive compressions.

A ball weighs 80g in air, 60g in water and 50g in liquid. If the density of water is 1g/cm^3 , find the density of the liquid.

21.n a circuit a metallic wire is connected in series with a battery and an ammeter.if another wire(same metal,same length and cross sectional area )is connected in parallel to the metallic wire , the current in ammeter will be: A)halved B) doubled C)four times D) same

a piece of sliver has a resistance of 1 ohm. What will be the resistance of a constant and wire of one third length and one half diameter if the specific resistance of constantan is 30 times that of silver?

In 1.0 s, a particle goes from point A to point B, moving in asemicircle ofradiua 1 m. The magnitude of the average velocity

A wire of resistance 4 Ω is stretched to twice its original length. The resistance of stretched wire would be -

There are two persons . One rahul and second rakesh . Suppose rahul's velocity is greater rakesh then colloison take place then then the linear momentumbecame 0 and force is exerted .Then force is exerted on rahul by rakesh or rakesh by rahul or both of them exerted force on each other?

Question 17The velocity of a body moving in a straight line is increased by applying a constant force F. for some distance in the direction of the motion. Prove that the increase in the kinetic energy of the body is equal to the work done by the force on the body.

4. calaculate the temperature at which o2 1atmospheric pressure has the same( ums) speed as that of n2 at NTP

Distinguish between acceleration and retardation.

Brakes are applied to a truck to produce an acceleration of –10 ms−2​. If the truck takes 5 s to stop after applying the brakes, then find the distance covered by the truck before coming to rest.

85.Apparent weight of body at the equator of planet is half of that at poles. if the peripheral velocity of a point on the equator of this planet is v then escape velocity of Polar particle will be (In terms of v)

21. What mass of water will be formed from 8 g of hydrogen and 20 g of oxygen?

Which of the following is the largest cell?

The diameter of the sun is 1.4×109 m and its distance from the earth is 1011 m. The diameter of its image, formed by a concave mirror of focal length 2 m will be :

Universal law of gravitation does not explain

A pendulum is suspended from a rigid support with the bottom end of its bob at a height of 20 cm and the point of suspension at 185 cm. If the radius of the bob is 211th of its effective length. Calculate and express the radius of the bob in metre.0.2538

If a copper wire is stretched to make its radius decreases by 0.1% then the percentage increase in resistance is nearly

If the kinetic energy of a body increases by 300%,A,by what percent shall the linear momentum of thebody increase?

The kinetic energies of a planet in an elliptical orbit about the sun at positions A, B and C are KA, KB and KC respectively. AC is the major axis and SB is perpendicular to AC at the position of the sun S as shown in the figure with SA<SB. Then,

Brakes are applied to a truck to produce an acceleration of –10 ms−2. If the truck takes 5 s to stop after applying the brakes, then find the distance covered by the truck before coming to rest.