13232 + Interview Questions in Physics Page 153 InterviewSolution

7601.	A wooden object floats in water kept in a beaker. The object is near a side of the beaker. Let PA, PB, PC be the pressures at the three points A, B and C of the bottom as shown in the figure.
Answer» A wooden object floats in water kept in a beaker. The object is near a side of the beaker. Let P_A, P_B, P_C be the pressures at the three points A, B and C of the bottom as shown in the figure.

7601.

A wooden object floats in water kept in a beaker. The object is near a side of the beaker. Let PA, PB, PC be the pressures at the three points A, B and C of the bottom as shown in the figure.

Answer»

A wooden object floats in water kept in a beaker. The object is near a side of the beaker. Let P_A, P_B, P_C be the pressures at the three points A, B and C of the bottom as shown in the figure.

Discussion

7602.	For an inverted image, height of the image is ______.
Answer» For an inverted image, height of the image is ______.

Discussion

7603.	NCERT chapter 8 question 3: Joseph jogs from one and A to the another and B of a straight 300m road in 2 minutes 30 seconds and then turns around and jogs 30m back to point C in another one minute. What are Joseph's average speed and velocities in jogging from A to B and from A to C ?
Answer» NCERT chapter 8 question 3: Joseph jogs from one and A to the another and B of a straight 300m road in 2 minutes 30 seconds and then turns around and jogs 30m back to point C in another one minute. What are Joseph's average speed and velocities in jogging from A to B and from A to C ?

Discussion

7604.	5. The rydberg constant for H is x. What will the rydberg constant for He ion
Answer» 5. The rydberg constant for H is x. What will the rydberg constant for He ion

Discussion

7605.	3. an object with mass 10 kg moves at a constant velocity of 10 metre per second a constant force then acts for 4 second on the object giving it a speed of 2 metre per second in the opposite direction the acceleration produced is 1)3 2)-3 3).3 4)-.3
Answer» 3. an object with mass 10 kg moves at a constant velocity of 10 metre per second a constant force then acts for 4 second on the object giving it a speed of 2 metre per second in the opposite direction the acceleration produced is 1)3 2)-3 3).3 4)-.3

Discussion

7606.	A cell supplies a current i1 through a resistance R1 and a current i2 through a resistance R2. The internal resistance of this cell is
Answer» A cell supplies a current $i_{1}$ through a resistance $R_{1}$ and a current $i_{2}$ through a resistance $R_{2}$ . The internal resistance of this cell is

Discussion

7607.	A cavity of radius R/2 is made inside a solid sphere of radius R.the center of cavity is located at a dis†an ce of R/2 from the centreof sphere.the gravitational force on the particle of mass m at a dis†an ce R/2from the centre of sphere on the line joining both the centres of sphere and cavity is (opposite to center of gravity) g=GM/R^2
Answer» A cavity of radius R/2 is made inside a solid sphere of radius R.the center of cavity is located at a dis†an ce of R/2 from the centreof sphere.the gravitational force on the particle of mass m at a dis†an ce R/2from the centre of sphere on the line joining both the centres of sphere and cavity is (opposite to center of gravity) g=GM/R^2

Discussion

7608.	A car accelerates from rest to 100 m/s in 10 seconds. If the mass of the car is 50 kg then power developed by the engine is:
Answer» A car accelerates from rest to $100 m / s$ in $10 s e c o n d s$ . If the mass of the car is $50 k g$ then power developed by the engine is:

Discussion

7609.	What is barmoulie's law?
Answer» What is barmoulie's law?

Discussion

7610.	A coin is thrown in a vertically upward direction with a velocity of 5 m s−1. If the acceleration of the coin during its motion is 10 m s−2 in the downward direction, what will be the height attained by the coin and how much time will it take to reach there respectively?
Answer» A coin is thrown in a vertically upward direction with a velocity of $5 m s^{- 1}$ . If the acceleration of the coin during its motion is $10 m s^{- 2}$ in the downward direction, what will be the height attained by the coin and how much time will it take to reach there respectively?

Discussion

7611.	Match the following: I. Coating solar cooker with black painta. Causes greenhouse effect inside the cookerII. Concave mirrorb. Absorbs more heatIII. Glass sheet coveringc. Converge heat at one point
Answer» Match the following: $\begin{matrix} I . C o a t i n g s o l a r c o o k e r w i t h b l a c k p a i n t & a . C a u s e s g r e e n h o u s e e f f e c t i n s i d e t h e c o o k e r I I . C o n c a v e m i r r o r & b . A b s o r b s m o r e h e a t I I I . G l a s s s h e e t c o v e r i n g & c . C o n v e r g e h e a t a t o n e p o i n t \end{matrix}$

Discussion

7612.	A bus decreases its speed from 80 km/hr to 60 km/hr in 5 s. Find the acceleration of the bus.
Answer» A bus decreases its speed from 80 km/hr to 60 km/hr in 5 s. Find the acceleration of the bus.

Discussion

7613.	Q.26When a single nuclei of 92U235 is fissioned, then 200 MeV energy is released. Number of fissions that must occur per second to produce a power of 1 MW is
Answer» Q.26 When a single nuclei of 92U235 is fissioned, then 200 MeV energy is released. Number of fissions that must occur per second to produce a power of 1 MW is

Discussion

7614.	Ques 1 )The v-t graph of a moving object is shown: 1 velocity of the body at point C 2 accelaration acting on the body between A and B 3 accelaration acting on the body between B and C 4 total distance covered from A to D
Answer» Ques 1 )The v-t graph of a moving object is shown: 1 velocity of the body at point C 2 accelaration acting on the body between A and B 3 accelaration acting on the body between B and C 4 total distance covered from A to D

7614.

Ques 1 )The v-t graph of a moving object is shown: 1 velocity of the body at point C 2 accelaration acting on the body between A and B 3 accelaration acting on the body between B and C 4 total distance covered from A to D

Answer»

Ques 1 )The v-t graph of a moving object is shown:

1 velocity of the body at point C

2 accelaration acting on the body between A and B

3 accelaration acting on the body between B and C

4 total distance covered from A to D

Discussion

7615.	Find the equivalent resistance between A and B.
Answer» Find the equivalent resistance between $A$ and $B$ .

Discussion

7616.	A particle is moving along a circle such that it completes one revolution in 40 seconds. In 2 minutes 20 seconds, the ratio \|displacement\| /distance is A)0B)1/7C)2/7D)1/11
Answer» A particle is moving along a circle such that it completes one revolution in 40 seconds. In 2 minutes 20 seconds, the ratio \|displacement\| /distance is A)0 B)1/7 C)2/7 D)1/11

Discussion

7617.	A student measured the diameter of a small steelball using a screw gauge of least count 0.001 cm.The main scale reading is 5 mm and zero ofcircular scale division coincides with 25 divisionsabove the reference level. If screw gauge has azero error of -0.004 cm, the correct diameter of theball is(1) 0.521 cm(2) 0.525 cm(3) 0.529 cm(4) 0.053 cm
Answer» A student measured the diameter of a small steelball using a screw gauge of least count 0.001 cm.The main scale reading is 5 mm and zero ofcircular scale division coincides with 25 divisionsabove the reference level. If screw gauge has azero error of -0.004 cm, the correct diameter of theball is(1) 0.521 cm(2) 0.525 cm(3) 0.529 cm(4) 0.053 cm

Discussion

7618.	A source of sound, producing a sinusoidal wave, is moving uniformly towards an observer at a velocity of 20 m/s. The observer is moving away from the source at a constant velocity of 10 m/s. Frequency of sound is 200 Hz and speed of sound in air is 340 m/s. How many times, in an interval of 10 sec, will the eardrums of the observer sense maximum change in pressure?
Answer» A source of sound, producing a sinusoidal wave, is moving uniformly towards an observer at a velocity of $20 m/s$ . The observer is moving away from the source at a constant velocity of $10 m/s.$ Frequency of sound is $200 Hz$ and speed of sound in air is $340 m/s$ . How many times, in an interval of $10 sec$ , will the eardrums of the observer sense maximum change in pressure?

Discussion

7619.	if a current of 0.5 ampere flows to the metallic wire for 2 hours till how many electrons would flow through the wire ?
Answer» if a current of 0.5 ampere flows to the metallic wire for 2 hours till how many electrons would flow through the wire ?

Discussion

7620.	If the mass of a body is 5 kg, its weight on the surface of the earth would be ___. [Take acceleration due to gravity, g=9.8 ms−2]
Answer» If the mass of a body is $5 k g,$ its weight on the surface of the earth would be ___. [Take acceleration due to gravity, $g = 9.8 m s^{- 2}]$

Discussion

7621.	25 when we use iso and when sec in naming.
Answer» 25 when we use iso and when sec in naming.

Discussion

7622.	A bullet of mass 10 gram is fired at a speed of 400 m per second from a gun of mass 4 kg. what is the velocity of the gun?
Answer» A bullet of mass 10 gram is fired at a speed of 400 m per second from a gun of mass 4 kg. what is the velocity of the gun?

Discussion

7623.	what is sound and characters?
Answer» what is sound and characters?

Discussion

7624.	(1) An object moves 18 m the in first 3 second and 22 m in the next 3 second while it travels 14 m in the last 3 second. Calculate average speed. [Ans = 6 m/s](2) A person travels a distance of 72 km in 4 hours. Calculate average speed in m/s.[Ans = 5 m/s]
Answer» (1) An object moves 18 m the in first 3 second and 22 m in the next 3 second while it travels 14 m in the last 3 second. Calculate average speed. [Ans = 6 m/s] (2) A person travels a distance of 72 km in 4 hours. Calculate average speed in m/s. [Ans = 5 m/s]

7624.

(1) An object moves 18 m the in first 3 second and 22 m in the next 3 second while it travels 14 m in the last 3 second. Calculate average speed. [Ans = 6 m/s](2) A person travels a distance of 72 km in 4 hours. Calculate average speed in m/s.[Ans = 5 m/s]

Answer»

(1) An object moves 18 m the in first 3 second and 22 m in the next 3 second while it travels 14 m in the last 3 second. Calculate average speed. [Ans = 6 m/s]

(2) A person travels a distance of 72 km in 4 hours. Calculate average speed in m/s.

[Ans = 5 m/s]

Discussion

7625.	An organ pipe A with both ends open, has a fundamental frequency of 300 Hz. The third harmonic of an organ pipe B, with one end open, has the same frequency as the second harmonic of pipe A. How long are pipes A and B? Speed of sound in air is 330 ms–1 and the end correction is to be neglected.
Answer» An organ pipe A with both ends open, has a fundamental frequency of 300 Hz. The third harmonic of an organ pipe B, with one end open, has the same frequency as the second harmonic of pipe A. How long are pipes A and B? Speed of sound in air is $330 m s^{- 1}$ and the end correction is to be neglected.

Discussion

7626.	two blocks of A and B mass 2 kg and 4 kg are connected by a string force acting on block A is 10 N and force acting on the block B is 20 n find the tension in the string connected between the blocks
Answer» two blocks of A and B mass 2 kg and 4 kg are connected by a string force acting on block A is 10 N and force acting on the block B is 20 n find the tension in the string connected between the blocks

Discussion

7627.	Question 69(v)The following graph shows the number of people present at a certain shop at different times. Observe the graph and answer the following questions.About how many people are there in the shop at 1:30 PM?
Answer» Question 69(v) The following graph shows the number of people present at a certain shop at different times. Observe the graph and answer the following questions. About how many people are there in the shop at 1:30 PM?

Discussion

7628.	Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.
Answer» Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.

Discussion

7629.	If we drop three watermelons weighing 2 kg, 4 kg and 6 kg respectively from the same height and at the same time, which one of it will reach the ground first? (Given: negligible air resistance)
Answer» If we drop three watermelons weighing $2 k g$ , $4 k g$ and $6 k g$ respectively from the same height and at the same time, which one of it will reach the ground first? (Given: negligible air resistance)

Discussion

7630.	From a rifle of mass 4 kg, a bullet of mass 50 g is fired with a velocity of 35 ms−1 with respect to the ground. Calculate the recoil velocity of the rifle.
Answer» From a rifle of mass $4 k g$ , a bullet of mass $50 g$ is fired with a velocity of $35 {m s}^{- 1}$ with respect to the ground. Calculate the recoil velocity of the rifle.

Discussion

7631.	do va de graaf generator stores electical energy?
Answer» do va de graaf generator stores electical energy?

Discussion

7632.	The following figure represents
Answer» The following figure represents

7632.

The following figure represents

Answer»

The following figure represents

Discussion

7633.	What can you say about motion of a body whose distance-time graph is a straight line parallel to the time axis?
Answer» What can you say about motion of a body whose distance-time graph is a straight line parallel to the time axis?

Discussion

7634.	What is the most essential property of a wave motion and why?
Answer» What is the most essential property of a wave motion and why?

Discussion

7635.	A spherical convex surface separates object and image spaces of refractive indices 1 and 4/3 respectively.If the radius of curvature of the surface is 10 cm,its power is: (1)1.5D (2)2.5 D (3)3.5 D (4)4.5
Answer» A spherical convex surface separates object and image spaces of refractive indices 1 and 4/3 respectively.If the radius of curvature of the surface is 10 cm,its power is: (1)1.5D (2)2.5 D (3)3.5 D (4)4.5

Discussion

7636.	Which device is used to control the flow of current in the circuit?
Answer» Which device is used to control the flow of current in the circuit?

Discussion

7637.	The total number of forces in the universe are:
Answer» The total number of forces in the universe are:

Discussion

7638.	Name the major parts present in a loudspeaker. Also, explain the working of a loudspeaker.
Answer» Name the major parts present in a loudspeaker. Also, explain the working of a loudspeaker.

Discussion

7639.	PHYSICSA tube of uniform cross-section consists of two vertical portions with a horizontalportion of 6 cm long. Enough water is poured to occupy 20 cm of the tube andenough vegetable oil of relative density 0.8 to occupy 20 cm is poured into theother. The position of the common surface from the middle of horizontal portion is3.2 cm4)3) 2 cm2) 0.4 cm1) 0.9 cm1
Answer» PHYSICSA tube of uniform cross-section consists of two vertical portions with a horizontalportion of 6 cm long. Enough water is poured to occupy 20 cm of the tube andenough vegetable oil of relative density 0.8 to occupy 20 cm is poured into theother. The position of the common surface from the middle of horizontal portion is3.2 cm4)3) 2 cm2) 0.4 cm1) 0.9 cm1

Discussion

7640.	ntwhat is forcen ntn
Answer» ntwhat is forcen ntn

Discussion

7641.	What is the numerical value of gravitational constant?
Answer» What is the numerical value of gravitational constant?

Discussion

7642.	Which of the following are factors affecting the pressure at a point in a liquid?
Answer» Which of the following are factors affecting the pressure at a point in a liquid?

Discussion

7643.	ntIf a planet of a given density were made larger, its force of attraction for an object on its surface would increase because of the planet's greater mass but would decrease because of the greater distance from the object to the centre of the planet. Which effect predominates?n
Answer» ntIf a planet of a given density were made larger, its force of attraction for an object on its surface would increase because of the planet's greater mass but would decrease because of the greater distance from the object to the centre of the planet. Which effect predominates?n

Discussion

7644.	What is the work done in moving a charge of 0.4 C across two points having a potential difference of 8 V?
Answer» What is the work done in moving a charge of 0.4 C across two points having a potential difference of 8 V?

Discussion

7645.	explain the first law of motion
Answer» explain the first law of motion

Discussion

7646.	Find out tension at distance y from free end of a string if linear mass density =constant (lambda kg/m)
Answer» Find out tension at distance y from free end of a string if linear mass density =constant (lambda kg/m)

Discussion

7647.	Explain the differences between regular and irregular reflection light.
Answer» Explain the differences between regular and irregular reflection light.

Discussion

7648.	a thin film of water is 3100amstrong thick of it is illuminated by white light at normal incidence the colur of film in the reflected light will be ??refractive index =4/
Answer» a thin film of water is 3100amstrong thick of it is illuminated by white light at normal incidence the colur of film in the reflected light will be ??refractive index =4/

Discussion

7649.	What does the area under the acceleration displacement graph represent?
Answer» What does the area under the acceleration displacement graph represent?

Discussion

7650.	Two identical heaters rated 220 V−1000 W are placed in series with each other across 220 V supply line, then the combined power is
Answer» Two identical heaters rated $220 V - 1000 W$ are placed in series with each other across $220 V$ supply line, then the combined power is

Discussion

Explore topic-wise InterviewSolutions in .

A wooden object floats in water kept in a beaker. The object is near a side of the beaker. Let PA, PB, PC be the pressures at the three points A, B and C of the bottom as shown in the figure.

For an inverted image, height of the image is ______.

NCERT chapter 8 question 3: Joseph jogs from one and A to the another and B of a straight 300m road in 2 minutes 30 seconds and then turns around and jogs 30m back to point C in another one minute. What are Joseph's average speed and velocities in jogging from A to B and from A to C ?

5. The rydberg constant for H is x. What will the rydberg constant for He ion

3. an object with mass 10 kg moves at a constant velocity of 10 metre per second a constant force then acts for 4 second on the object giving it a speed of 2 metre per second in the opposite direction the acceleration produced is 1)3 2)-3 3).3 4)-.3

A cell supplies a current i1 through a resistance R1 and a current i2 through a resistance R2. The internal resistance of this cell is

A car accelerates from rest to 100 m/s in 10 seconds. If the mass of the car is 50 kg then power developed by the engine is:

What is barmoulie's law?

A coin is thrown in a vertically upward direction with a velocity of 5 m s−1. If the acceleration of the coin during its motion is 10 m s−2 in the downward direction, what will be the height attained by the coin and how much time will it take to reach there respectively?

Match the following: I. Coating solar cooker with black painta. Causes greenhouse effect inside the cookerII. Concave mirrorb. Absorbs more heatIII. Glass sheet coveringc. Converge heat at one point

A bus decreases its speed from 80 km/hr to 60 km/hr in 5 s. Find the acceleration of the bus.

Q.26When a single nuclei of 92U235 is fissioned, then 200 MeV energy is released. Number of fissions that must occur per second to produce a power of 1 MW is

Ques 1 )The v-t graph of a moving object is shown: 1 velocity of the body at point C 2 accelaration acting on the body between A and B 3 accelaration acting on the body between B and C 4 total distance covered from A to D

Find the equivalent resistance between A and B.

A particle is moving along a circle such that it completes one revolution in 40 seconds. In 2 minutes 20 seconds, the ratio |displacement| /distance is A)0B)1/7C)2/7D)1/11

if a current of 0.5 ampere flows to the metallic wire for 2 hours till how many electrons would flow through the wire ?

If the mass of a body is 5 kg, its weight on the surface of the earth would be ___. [Take acceleration due to gravity, g=9.8 ms−2]

25 when we use iso and when sec in naming.

A bullet of mass 10 gram is fired at a speed of 400 m per second from a gun of mass 4 kg. what is the velocity of the gun?

what is sound and characters?

(1) An object moves 18 m the in first 3 second and 22 m in the next 3 second while it travels 14 m in the last 3 second. Calculate average speed. [Ans = 6 m/s](2) A person travels a distance of 72 km in 4 hours. Calculate average speed in m/s.[Ans = 5 m/s]

An organ pipe A with both ends open, has a fundamental frequency of 300 Hz. The third harmonic of an organ pipe B, with one end open, has the same frequency as the second harmonic of pipe A. How long are pipes A and B? Speed of sound in air is 330 ms–1 and the end correction is to be neglected.

two blocks of A and B mass 2 kg and 4 kg are connected by a string force acting on block A is 10 N and force acting on the block B is 20 n find the tension in the string connected between the blocks

Question 69(v)The following graph shows the number of people present at a certain shop at different times. Observe the graph and answer the following questions.About how many people are there in the shop at 1:30 PM?

Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.

If we drop three watermelons weighing 2 kg, 4 kg and 6 kg respectively from the same height and at the same time, which one of it will reach the ground first? (Given: negligible air resistance)

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with a velocity of 35 ms−1​ with respect to the ground. Calculate the recoil velocity of the rifle.

do va de graaf generator stores electical energy?

The following figure represents

What can you say about motion of a body whose distance-time graph is a straight line parallel to the time axis?

What is the most essential property of a wave motion and why?

A spherical convex surface separates object and image spaces of refractive indices 1 and 4/3 respectively.If the radius of curvature of the surface is 10 cm,its power is: (1)1.5D (2)2.5 D (3)3.5 D (4)4.5

Which device is used to control the flow of current in the circuit?

The total number of forces in the universe are:

Name the major parts present in a loudspeaker. Also, explain the working of a loudspeaker.

ntwhat is forcen ntn

What is the numerical value of gravitational constant?

Which of the following are factors affecting the pressure at a point in a liquid?

ntIf a planet of a given density were made larger, its force of attraction for an object on its surface would increase because of the planet's greater mass but would decrease because of the greater distance from the object to the centre of the planet. Which effect predominates?n

What is the work done in moving a charge of 0.4 C across two points having a potential difference of 8 V?

explain the first law of motion

Find out tension at distance y from free end of a string if linear mass density =constant (lambda kg/m)

Explain the differences between regular and irregular reflection light.

a thin film of water is 3100amstrong thick of it is illuminated by white light at normal incidence the colur of film in the reflected light will be ??refractive index =4/

What does the area under the acceleration displacement graph represent?

Two identical heaters rated 220 V−1000 W are placed in series with each other across 220 V supply line, then the combined power is

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with a velocity of 35 ms−1 with respect to the ground. Calculate the recoil velocity of the rifle.