13232 + Interview Questions in Physics Page 72 InterviewSolution

3551.	Meaning of concentrated?Concentation of weight and massWhat is this concentration mean here?
Answer» Meaning of concentrated? Concentation of weight and mass What is this concentration mean here?

Discussion

3552.	The wavelength of two sound waves are 34.5 cm and 34.7 cm respectively. If the room temperature is 27∘C, then the frequency of beats produced by them is approximately: (velocity of sound in air at 27∘C=340 m/s)
Answer» The wavelength of two sound waves are $34.5 cm$ and $34.7 cm$ respectively. If the room temperature is $27^{\circ} C$ , then the frequency of beats produced by them is approximately: (velocity of sound in air at $27^{\circ} C = 340 m/s$ )

Discussion

3553.	What are decomposers? What will be the consequence of their absence in an ecosystem?
Answer» What are decomposers? What will be the consequence of their absence in an ecosystem?

Discussion

3554.	Which is greater−the speed of light or the speed or sound?
Answer» Which is greater−the speed of light or the speed or sound?

Discussion

3555.	A particle is moving along X axis so that it's velocity varies with time as v=2t-8 .distance travelled by the particle in time interval 1 sec to 6 sec is
Answer» A particle is moving along X axis so that it's velocity varies with time as v=2t-8 .distance travelled by the particle in time interval 1 sec to 6 sec is

Discussion

3556.	What is the SI unit of momentum?
Answer» What is the SI unit of momentum?

Discussion

3557.	a passenger is walking on an elevator at speed 6 km/hr relative to escaltor.tje elevator is moving with 3km/hr relative to ground and has a total lenght of 120m.time raken by him to reach the end f elevato
Answer» a passenger is walking on an elevator at speed 6 km/hr relative to escaltor.tje elevator is moving with 3km/hr relative to ground and has a total lenght of 120m.time raken by him to reach the end f elevato

Discussion

3558.	What are the two types of reflecting telescopes? Draw their labelled diagrams.
Answer» What are the two types of reflecting telescopes? Draw their labelled diagrams.

Discussion

3559.	92. A longitudinal sound wave given by P 2.5sinx-600 t) (P is in NIm2 and x is in metre and t is in secondis sent down a closed organ pipe. If the pipe vibrates in its second overtone, the length of the pipe is(1) 6 m(3) 5 m(2) 8 m(4) 10 m
Answer» 92. A longitudinal sound wave given by P 2.5sinx-600 t) (P is in NIm2 and x is in metre and t is in secondis sent down a closed organ pipe. If the pipe vibrates in its second overtone, the length of the pipe is(1) 6 m(3) 5 m(2) 8 m(4) 10 m

Discussion

3560.	Find the emf and internal resistance of a single battery which is equivalent to a combination of three batteries as shown in the figure.
Answer» Find the emf and internal resistance of a single battery which is equivalent to a combination of three batteries as shown in the figure.

Discussion

3561.	A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m upward while applying the force and the ball goes upto 2 m height further, find the magnitude of the force (in newtons). [Take g=10 m/s2]
Answer» A ball of mass $0.2 kg$ is thrown vertically upwards by applying a force by hand. If the hand moves $0.2 m$ upward while applying the force and the ball goes upto $2 m$ height further, find the magnitude of the force (in newtons). [Take $g = 10 {m/s}^{2}$ ]

Discussion

3562.	from a point on the ground a particle is projected with initial velocity u such that its horizontal range is maximum .the magnitude of average velocity during its ascent
Answer» from a point on the ground a particle is projected with initial velocity u such that its horizontal range is maximum .the magnitude of average velocity during its ascent

Discussion

3563.	When is the magnitude of displacement equal to the distance ?
Answer» When is the magnitude of displacement equal to the distance ?

Discussion

3564.	Action and reaction do not cancel each other out because
Answer» Action and reaction do not cancel each other out because

Discussion

3565.	A horizontal pipe line carries water in streamline flow.At a point where the cross sectional area is 10 cm2 the water velocity is 1 m/s and pressure is 2000 Pa.The pressure of water when the cross sectional area is 5 cm2is ?
Answer» A horizontal pipe line carries water in streamline flow.At a point where the cross sectional area is 10 cm2 the water velocity is 1 m/s and pressure is 2000 Pa.The pressure of water when the cross sectional area is 5 cm2is ?

Discussion

3566.	if delta is the depression produced in a beam of length L, breadth b and thickness d, when a load is placed at the midpoint the
Answer» if delta is the depression produced in a beam of length L, breadth b and thickness d, when a load is placed at the midpoint the

Discussion

3567.	a particle projected vertically up attains height h at 2s and 6s the maximum height attained by the particle i
Answer» a particle projected vertically up attains height h at 2s and 6s the maximum height attained by the particle i

Discussion

3568.	In a room, a fly is at position P and a lizard is at Q. If both take the shortest possible route and reach R simultaneously,then the ratio of their speeds is:
Answer» In a room, a fly is at position P and a lizard is at Q. If both take the shortest possible route and reach R simultaneously,then the ratio of their speeds is:

Discussion

3569.	A car accelerated from rest to a speed of 10m/s. Energy spent by engine on car is E. If we accelerate the car from 10m/s to 20m/s, th eenergy spent by engine on car wil be
Answer» A car accelerated from rest to a speed of 10m/s. Energy spent by engine on car is E. If we accelerate the car from 10m/s to 20m/s, th eenergy spent by engine on car wil be

Discussion

3570.	Why doesn't a car move when we give it a sharp push and it moves when we give it a gradual acceleration? Isn't the rate of change of momentum larger when we give it a sharp push? Then why doesnt it move when we give it a sharp push? Please explain
Answer» Why doesn't a car move when we give it a sharp push and it moves when we give it a gradual acceleration? Isn't the rate of change of momentum larger when we give it a sharp push? Then why doesnt it move when we give it a sharp push? Please explain

Discussion

3571.	A vernier calliper has 25 divisions on its vernier scale for every 35 divisions on its main scale. If 1 cm on the main scale is split into 12 units, the least count of the calliper will be.
Answer» A vernier calliper has 25 divisions on its vernier scale for every 35 divisions on its main scale. If 1 cm on the main scale is split into 12 units, the least count of the calliper will be.

Discussion

3572.	A force of 10 N if applied to a body initially at rest. Find the momentum of the body after 4 seconds.
Answer» A force of 10 N if applied to a body initially at rest. Find the momentum of the body after 4 seconds.

Discussion

3573.	Which of the following are units of velocity?
Answer» Which of the following are units of velocity?

Discussion

3574.	Hi mam, I have a doubt.. A body covers one complete revolution around a circular park of circumference 176m in 4 minutes. find the displacement of body after 6 minutes?
Answer» Hi mam, I have a doubt.. A body covers one complete revolution around a circular park of circumference 176m in 4 minutes. find the displacement of body after 6 minutes?

Discussion

3575.	why is normal sound is not used for detect cracks in metal
Answer» why is normal sound is not used for detect cracks in metal

Discussion

3576.	An object has a velocity u at time t=0, it is undergoing retardation a and covers a distance s attaining a velocity v in time t. Which of the following equations of motion correctly describe the motion?
Answer» An object has a velocity $u$ at time $t = 0$ , it is undergoing retardation $a$ and covers a distance $s$ attaining a velocity $v$ in time $t$ . Which of the following equations of motion correctly describe the motion?

Discussion

3577.	Write the energy transformations which take place in an electric bulb (or electric lamp).
Answer» Write the energy transformations which take place in an electric bulb (or electric lamp).

Discussion

3578.	An ox can apply a maximum force of 1000 N.It is taking part in a cart race and is able to pull the cart at a constant speed of 30 m s−1 while making its best effort.Calculate the power developed by the ox.
Answer» An ox can apply a maximum force of 1000 N.It is taking part in a cart race and is able to pull the cart at a constant speed of 30 m $s^{- 1}$ while making its best effort.Calculate the power developed by the ox.

Discussion

3579.	When a man jump out from a boat to the bank of river of the boat moves backward direction. Identify the action and reaction?
Answer» When a man jump out from a boat to the bank of river of the boat moves backward direction. Identify the action and reaction?

Discussion

3580.	Two particles are oscillating along two close parallel straight lines side by side, with the same frequency and same amplitude. They pass each other, moving in opposite direction when their displacement is half of their amplitude , what is the phase difference?
Answer» Two particles are oscillating along two close parallel straight lines side by side, with the same frequency and same amplitude. They pass each other, moving in opposite direction when their displacement is half of their amplitude , what is the phase difference?

Discussion

3581.	An inverted tube barometer is kept in a lift moving vertical upward with an acceleration 'a'. The density of mercury is ρ and acceleration due to gravity is g. If the atmospheric pressure is Po then:
Answer» An inverted tube barometer is kept in a lift moving vertical upward with an acceleration 'a'. The density of mercury is $ρ$ and acceleration due to gravity is g. If the atmospheric pressure is $P_{o}$ then:

Discussion

3582.	What is the number of seconds in a solar day?
Answer» What is the number of seconds in a solar day?

Discussion

3583.	The density of a metal is 10.8×103 kg/m³. Find the relative density of the metal.
Answer» The density of a metal is 10.8×103 kg/m³. Find the relative density of the metal.

Discussion

3584.	A tuning fork of frequency 440Hz resonates with a tube closed at one end of length 1.8 cm and diameter 5 cm in fundamental mode.The velocity of sound in air is?
Answer» A tuning fork of frequency 440Hz resonates with a tube closed at one end of length 1.8 cm and diameter 5 cm in fundamental mode.The velocity of sound in air is?

Discussion

3585.	Momentum has the same unit as that of:
Answer» Momentum has the same unit as that of:

Discussion

3586.	The third equation of motion is given by = 2as
Answer» The third equation of motion is given by = 2as

Discussion

3587.	If escape velocity from the surface of earth is V0. Then escape velocity from the surface of a planet whose mass density is 4 times the density of earth and radius is (13)rd of radius of earth, will be
Answer» If escape velocity from the surface of earth is $V_{0}$ . Then escape velocity from the surface of a planet whose mass density is $4$ times the density of earth and radius is ${(\frac{1}{3})}^{r d}$ of radius of earth, will be

Discussion

3588.	The value of ∣∣∣1logbalogab1∣∣∣,(a,b>0,a≠1≠b) is equal to
Answer» The value of $∣ ∣ ∣ \begin{matrix} 1 & {log}_{b} a {log}_{a} b & 1 \end{matrix} ∣ ∣ ∣, (a, b > 0, a \neq 1 \neq b)$ is equal to

Discussion

3589.	Speed of the sound in a perfectly rigid rod would be
Answer» Speed of the sound in a perfectly rigid rod would be

Discussion

3590.	What does this equation stands for i) (initial velocity +final velocity)/2 ii) (final velocity - initial velocity)/time
Answer» What does this equation stands for i) (initial velocity +final velocity)/2 ii) (final velocity - initial velocity)/time

3590.

What does this equation stands for i) (initial velocity +final velocity)/2 ii) (final velocity - initial velocity)/time

Answer»

What does this equation stands for

i) (initial velocity +final velocity)/2

ii) (final velocity - initial velocity)/time

Discussion

3591.	Question 7Ocean thermal energy is due to the(a) energy stored by waves in the ocean(b) temperature difference at different levels in the ocean(c) pressure difference at different levels in the ocean(d) tides arising out in the ocean
Answer» Question 7 Ocean thermal energy is due to the (a) energy stored by waves in the ocean (b) temperature difference at different levels in the ocean (c) pressure difference at different levels in the ocean (d) tides arising out in the ocean

Discussion

3592.	Question 11A full length image of a distant tall building can definitely be seen by using(a) a concave mirror(b) a convex mirror(c) a plane mirror(d) both concave as well as plane mirror
Answer» Question 11 A full length image of a distant tall building can definitely be seen by using (a) a concave mirror (b) a convex mirror (c) a plane mirror (d) both concave as well as plane mirror

Discussion

3593.	If a copper wire is stretched to make it 0.1% longer , then what is the percentage change in it's resistance(approximately)?
Answer» If a copper wire is stretched to make it 0.1% longer , then what is the percentage change in it's resistance(approximately)?

Discussion

3594.	8. The density of chlorine relative to air having density 14.4 is: A)2.44 B)3 C)71 D)4
Answer» 8. The density of chlorine relative to air having density 14.4 is: A)2.44 B)3 C)71 D)4

Discussion

3595.	"Violet scatters the most in the atmosphere but still the sky appears blue." Justify the given statement.
Answer» "Violet scatters the most in the atmosphere but still the sky appears blue." Justify the given statement.

Discussion

3596.	When you are crossing a road and a car is coming towards you.As it comes close the sound of its horn
Answer» When you are crossing a road and a car is coming towards you.As it comes close the sound of its horn

Discussion

3597.	Two monkeys of masses 5 kg and 4 kg are moving alongvertical rope, the former climbing up with an acceleration ofm/s2 while the later coming down with a uniform velocity ofm/s. Tension in the rope at the fixed support is
Answer» Two monkeys of masses 5 kg and 4 kg are moving alongvertical rope, the former climbing up with an acceleration ofm/s2 while the later coming down with a uniform velocity ofm/s. Tension in the rope at the fixed support is

Discussion

3598.	From the top of the tower 100m in height, a ball is dropped and at same time another ball is projected vertically upward from groundwith the velocity 25m/s . Find when and where two balls meet?(g=9.8m/s)
Answer» From the top of the tower 100m in height, a ball is dropped and at same time another ball is projected vertically upward from groundwith the velocity 25m/s . Find when and where two balls meet?(g=9.8m/s)

Discussion

3599.	A 100 W and 500 W bulb are joined in parallel with the mains . Which bulb will glow brighter?Give reasons
Answer» A 100 W and 500 W bulb are joined in parallel with the mains . Which bulb will glow brighter?Give reasons

Discussion

3600.	Question 26With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor?
Answer» Question 26 With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor?

Discussion

Explore topic-wise InterviewSolutions in .

Meaning of concentrated?Concentation of weight and massWhat is this concentration mean here?

The wavelength of two sound waves are 34.5 cm and 34.7 cm respectively. If the room temperature is 27∘C, then the frequency of beats produced by them is approximately: (velocity of sound in air at 27∘C=340 m/s)

What are decomposers? What will be the consequence of their absence in an ecosystem?

Which is greater−the speed of light or the speed or sound?

A particle is moving along X axis so that it's velocity varies with time as v=2t-8 .distance travelled by the particle in time interval 1 sec to 6 sec is

What is the SI unit of momentum?

a passenger is walking on an elevator at speed 6 km/hr relative to escaltor.tje elevator is moving with 3km/hr relative to ground and has a total lenght of 120m.time raken by him to reach the end f elevato

What are the two types of reflecting telescopes? Draw their labelled diagrams.

92. A longitudinal sound wave given by P 2.5sinx-600 t) (P is in NIm2 and x is in metre and t is in secondis sent down a closed organ pipe. If the pipe vibrates in its second overtone, the length of the pipe is(1) 6 m(3) 5 m(2) 8 m(4) 10 m

Find the emf and internal resistance of a single battery which is equivalent to a combination of three batteries as shown in the figure.

A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m upward while applying the force and the ball goes upto 2 m height further, find the magnitude of the force (in newtons). [Take g=10 m/s2]

from a point on the ground a particle is projected with initial velocity u such that its horizontal range is maximum .the magnitude of average velocity during its ascent

When is the magnitude of displacement equal to the distance ?

Action and reaction do not cancel each other out because

A horizontal pipe line carries water in streamline flow.At a point where the cross sectional area is 10 cm2 the water velocity is 1 m/s and pressure is 2000 Pa.The pressure of water when the cross sectional area is 5 cm2is ?

if delta is the depression produced in a beam of length L, breadth b and thickness d, when a load is placed at the midpoint the

a particle projected vertically up attains height h at 2s and 6s the maximum height attained by the particle i

In a room, a fly is at position P and a lizard is at Q. If both take the shortest possible route and reach R simultaneously,then the ratio of their speeds is:

A car accelerated from rest to a speed of 10m/s. Energy spent by engine on car is E. If we accelerate the car from 10m/s to 20m/s, th eenergy spent by engine on car wil be

Why doesn't a car move when we give it a sharp push and it moves when we give it a gradual acceleration? Isn't the rate of change of momentum larger when we give it a sharp push? Then why doesnt it move when we give it a sharp push? Please explain

A vernier calliper has 25 divisions on its vernier scale for every 35 divisions on its main scale. If 1 cm on the main scale is split into 12 units, the least count of the calliper will be.

A force of 10 N if applied to a body initially at rest. Find the momentum of the body after 4 seconds.

Which of the following are units of velocity?

Hi mam, I have a doubt.. A body covers one complete revolution around a circular park of circumference 176m in 4 minutes. find the displacement of body after 6 minutes?

why is normal sound is not used for detect cracks in metal

An object has a velocity u at time t=0, it is undergoing retardation a and covers a distance s attaining a velocity v in time t. Which of the following equations of motion correctly describe the motion?

Write the energy transformations which take place in an electric bulb (or electric lamp).

An ox can apply a maximum force of 1000 N.It is taking part in a cart race and is able to pull the cart at a constant speed of 30 m s−1 while making its best effort.Calculate the power developed by the ox.

When a man jump out from a boat to the bank of river of the boat moves backward direction. Identify the action and reaction?

Two particles are oscillating along two close parallel straight lines side by side, with the same frequency and same amplitude. They pass each other, moving in opposite direction when their displacement is half of their amplitude , what is the phase difference?

An inverted tube barometer is kept in a lift moving vertical upward with an acceleration 'a'. The density of mercury is ρ and acceleration due to gravity is g. If the atmospheric pressure is Po then:

What is the number of seconds in a solar day?

The density of a metal is 10.8×103 kg/m³. Find the relative density of the metal.

A tuning fork of frequency 440Hz resonates with a tube closed at one end of length 1.8 cm and diameter 5 cm in fundamental mode.The velocity of sound in air is?

Momentum has the same unit as that of:

The third equation of motion is given by = 2as

If escape velocity from the surface of earth is V0. Then escape velocity from the surface of a planet whose mass density is 4 times the density of earth and radius is (13)rd of radius of earth, will be

The value of ∣∣∣1logbalogab1∣∣∣,(a,b&gt;0,a≠1≠b) is equal to

Speed of the sound in a perfectly rigid rod would be

What does this equation stands for i) (initial velocity +final velocity)/2 ii) (final velocity - initial velocity)/time

Question 7Ocean thermal energy is due to the(a) energy stored by waves in the ocean(b) temperature difference at different levels in the ocean(c) pressure difference at different levels in the ocean(d) tides arising out in the ocean

Question 11A full length image of a distant tall building can definitely be seen by using(a) a concave mirror(b) a convex mirror(c) a plane mirror(d) both concave as well as plane mirror

If a copper wire is stretched to make it 0.1% longer , then what is the percentage change in it's resistance(approximately)?

8. The density of chlorine relative to air having density 14.4 is: A)2.44 B)3 C)71 D)4

"Violet scatters the most in the atmosphere but still the sky appears blue." Justify the given statement.

When you are crossing a road and a car is coming towards you.As it comes close the sound of its horn

Two monkeys of masses 5 kg and 4 kg are moving alongvertical rope, the former climbing up with an acceleration ofm/s2 while the later coming down with a uniform velocity ofm/s. Tension in the rope at the fixed support is

From the top of the tower 100m in height, a ball is dropped and at same time another ball is projected vertically upward from groundwith the velocity 25m/s . Find when and where two balls meet?(g=9.8m/s)

A 100 W and 500 W bulb are joined in parallel with the mains . Which bulb will glow brighter?Give reasons

Question 26With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor?

The value of ∣∣∣1logbalogab1∣∣∣,(a,b>0,a≠1≠b) is equal to