13232 + Interview Questions in Physics Page 241 InterviewSolution

12001.	Which of the conditions shows that the particles are in equilibrium state for two forces F1and F2 acting on the body?
Answer» Which of the conditions shows that the particles are in equilibrium state for two forces F₁and F₂ acting on the body?

Discussion

12002.	A person standing between two vertical cliffs and 640m away from the nearest cliff shouted. He heard the first echo after 4 seconds and the second echo 3 seconds later. Calculate the distance between the cliffs.
Answer» A person standing between two vertical cliffs and 640m away from the nearest cliff shouted. He heard the first echo after 4 seconds and the second echo 3 seconds later. Calculate the distance between the cliffs.

Discussion

12003.	A truck is moving with a certain uniform velocity. It is accelerated uniformly by 0.75m/s2. After 20 seconds, the velocity of the truck becomes 72 km/h. What is the initial velocity of the truck?
Answer» A truck is moving with a certain uniform velocity. It is accelerated uniformly by $0.75 m / s^{2}$ . After 20 seconds, the velocity of the truck becomes 72 km/h. What is the initial velocity of the truck?

Discussion

12004.	If time period of SHM of system as shown in figure is T=2π√mmk then value of n is
Answer» If time period of SHM of system as shown in figure is $T = 2 π \sqrt{\frac{m}{m k}}$ then value of n is

Discussion

12005.	How much work is done when a force of 1 N moves a body through a distance of 1m in its own direction?
Answer» How much work is done when a force of 1 N moves a body through a distance of 1m in its own direction?

Discussion

12006.	Choose the correct option. 1.Tonei.Frequencies that are integral multiple of fundamental frequency.2.Noteii.Sound of single frequency.3.Overtoneiii.Sound of multiple frequencies.4.Harmoniciv.Higher frequencies other than fundamental frequency.
Answer» Choose the correct option. $\begin{matrix} 1. & T o n e & i . & F r e q u e n c i e s t h a t a r e i n t e g r a l m u l t i p l e o f f u n d a m e n t a l f r e q u e n c y . 2. & N o t e & i i . & S o u n d o f s i n g l e f r e q u e n c y . 3. & O v e r t o n e & i i i . & S o u n d o f m u l t i p l e f r e q u e n c i e s . 4. & H a r m o n i c & i v . & H i g h e r f r e q u e n c i e s o t h e r t h a n f u n d a m e n t a l f r e q u e n c y . \end{matrix}$

12006.

Choose the correct option. 1.Tonei.Frequencies that are integral multiple of fundamental frequency.2.Noteii.Sound of single frequency.3.Overtoneiii.Sound of multiple frequencies.4.Harmoniciv.Higher frequencies other than fundamental frequency.

Answer»

Choose the correct option.

$\begin{matrix} 1. & T o n e & i . & F r e q u e n c i e s t h a t a r e i n t e g r a l m u l t i p l e o f f u n d a m e n t a l f r e q u e n c y . 2. & N o t e & i i . & S o u n d o f s i n g l e f r e q u e n c y . 3. & O v e r t o n e & i i i . & S o u n d o f m u l t i p l e f r e q u e n c i e s . 4. & H a r m o n i c & i v . & H i g h e r f r e q u e n c i e s o t h e r t h a n f u n d a m e n t a l f r e q u e n c y . \end{matrix}$

Discussion

12007.	The buoyant force always acts in ___ direction. (If the weight is acting downwards)?
Answer» The buoyant force always acts in ___ direction. (If the weight is acting downwards)?

Discussion

12008.	A boy was playing with a spongy ball, compressing and releasing it. What will be the work done by the boy on the ball and the ball on the boy respectively at the time of compressing?
Answer» A boy was playing with a spongy ball, compressing and releasing it. What will be the work done by the boy on the ball and the ball on the boy respectively at the time of compressing?

Discussion

12009.	If the radius of the earth shrinks by 4% and there is no change in its mass then by how much does the value of g change? ( Given for x<<1 , assume 1(1−x)2≈1+2x)
Answer» If the radius of the earth shrinks by $4 %$ and there is no change in its mass then by how much does the value of $g$ change? ( Given for $x << 1$ , assume $\frac{1}{(1 - x)^{2}} \approx 1 + 2 x$ )

Discussion

12010.	An object is put one by one in 3 liquids having different densities. The object floats with 19, 211 and 37 parts of their volumes outside the liquid surface in liquids of densities d1, d2 and d3 respectively. Arrange the densities in ascending order of their magnitude.
Answer» An object is put one by one in 3 liquids having different densities. The object floats with $\frac{1}{9}$ , $\frac{2}{11}$ and $\frac{3}{7}$ parts of their volumes outside the liquid surface in liquids of densities $d_{1}$ , $d_{2}$ and $d_{3}$ respectively. Arrange the densities in ascending order of their magnitude.

Discussion

12011.	The velocity of water in a river is 18 km h-1 near the surface. If the river is 5 m deep, find the shearing stress between the horizontal layers of water. The coefficient of viscosity of water = 10-2 poise.
Answer» The velocity of water in a river is 18 km h^-1 near the surface. If the river is 5 m deep, find the shearing stress between the horizontal layers of water. The coefficient of viscosity of water = 10^-2 poise.

Discussion

12012.	The graph shows the variation of speed of a car with time. Find the distance travelled in first 8 hours. (Given: E = 3 seconds and G = 35 kmph).
Answer» The graph shows the variation of speed of a car with time. Find the distance travelled in first $8 h o u r s$ . (Given: $E$ = $3 s e c o n d s$ and $G$ = $35 k m p h$ ).

Discussion

12013.	A stone of mass m is tied to a string of length I and rotated in a circle with a constant speed v. If the string is released, the stone flies
Answer» A stone of mass m is tied to a string of length I and rotated in a circle with a constant speed v. If the string is released, the stone flies

Discussion

12014.	What kind of energy is the energy of the motion of an avalanche?
Answer» What kind of energy is the energy of the motion of an avalanche?

Discussion

12015.	The S.I. unit of pressure is : (a) N cm−2 (b) Pa (c) N (d) N m2
Answer» The S.I. unit of pressure is : (a) $N c m^{- 2}$ (b) Pa (c) N (d) $N m^{2}$

Discussion

12016.	A force of 15 N acts on a body of mass 2 kg. Calculate the acceleration produced.
Answer» A force of 15 N acts on a body of mass 2 kg. Calculate the acceleration produced.

Discussion

12017.	A boy throws a ball along the flat ground. The ball slows down after traveling a distance. What is the opposing force, acting on the ball, that brought it to rest?
Answer» A boy throws a ball along the flat ground. The ball slows down after traveling a distance. What is the opposing force, acting on the ball, that brought it to rest?

Discussion

12018.	Which of the following factors does the speed of sound in a medium depend upon?
Answer» Which of the following factors does the speed of sound in a medium depend upon?

Discussion

12019.	A micrometre screw gauge has a negative zero error of 0.0018 cm. The main scale reading is 3.6 cm for an object. The baseline coincides with the 45th division of the circular scale. Calculate the true length of the object in cm.
Answer» A micrometre screw gauge has a negative zero error of $0.0018 c m$ . The main scale reading is $3.6 c m$ for an object. The baseline coincides with the $45^{t h}$ division of the circular scale. Calculate the true length of the object in $c m$ .

Discussion

12020.	an object is dropped from the top of a tower distance it covers in last second is 7 times the distance it covered in the first second find time of flight?
Answer» an object is dropped from the top of a tower distance it covers in last second is 7 times the distance it covered in the first second find time of flight?

Discussion

12021.	What causes sound?
Answer» What causes sound?

Discussion

12022.	How can seat belts helps us ??
Answer» How can seat belts helps us ??

Discussion

12023.	Charges 2Q and -Q are placed at certain distance. The point where the electric field will be zero is? a)somewhere between -Q and 2Q b)on the left of -Q c)on the right of 2Q d)on the right bisector of line joining 2Q and -Q
Answer» Charges 2Q and -Q are placed at certain distance. The point where the electric field will be zero is? a)somewhere between -Q and 2Q b)on the left of -Q c)on the right of 2Q d)on the right bisector of line joining 2Q and -Q

12023.

Charges 2Q and -Q are placed at certain distance. The point where the electric field will be zero is? a)somewhere between -Q and 2Q b)on the left of -Q c)on the right of 2Q d)on the right bisector of line joining 2Q and -Q

Answer»

Charges 2Q and -Q are placed at certain distance. The point where the electric field will be zero is?

a)somewhere between -Q and 2Q

b)on the left of -Q

c)on the right of 2Q

d)on the right bisector of line joining 2Q and -Q

Discussion

12024.	A coin of 10g is falling into a pool of water. If the buoyant force on the coin is 0.09N. What is the acceleration of the fall?
Answer» A coin of 10g is falling into a pool of water. If the buoyant force on the coin is 0.09N. What is the acceleration of the fall?

Discussion

12025.	Forces always occurs in pairs from which law can we conclude the above statement. Give 2 example to support your answer.
Answer» Forces always occurs in pairs from which law can we conclude the above statement. Give 2 example to support your answer.

Discussion

12026.	Which of these is false?
Answer» Which of these is false?

Discussion

12027.	Derive the formula s=it+1/2at2
Answer» Derive the formula s=it+1/2at2

Discussion

12028.	A coin and a piece of paper are dropped simultaneously from the same height . which of them will touch the ground first and why?
Answer» A coin and a piece of paper are dropped simultaneously from the same height . which of them will touch the ground first and why?

Discussion

12029.	A car is traveling at 36km/h if it's velocity increase to 73km/h in five s than find the acceleration of the car in SI UNIT
Answer» A car is traveling at 36km/h if it's velocity increase to 73km/h in five s than find the acceleration of the car in SI UNIT

Discussion

12030.	The work done by the string of a simple pendulum in S.H.M is
Answer» The work done by the string of a simple pendulum in S.H.M is

Discussion

12031.	What is the effective length of a second's pendulum for a place where g = 9.8 m s−2? [Given: The time period of a seconds' pendulum = 2 s]
Answer» What is the effective length of a second's pendulum for a place where g = 9.8 $m s^{- 2}$ ? [Given: The time period of a seconds' pendulum = 2 s]

Discussion

12032.	A pump raises water by spending 4×105 J of energy in 10 s. Find the power of pump.
Answer» A pump raises water by spending $4 \times 10^{5}$ J of energy in 10 s. Find the power of pump.

Discussion

12033.	Use the following information to answer the next question. Bittoo connects three resistors R, 2R, and 4R in parallel and connects them to a battery. He then connects three voltmeters V1, V2, and V3 across these resistors, as shown in the given figure. What will be the respective readings shown by V1, V2,and V3?
Answer» Use the following information to answer the next question. Bittoo connects three resistors R, 2R, and 4R in parallel and connects them to a battery. He then connects three voltmeters V₁, V₂, and V₃ across these resistors, as shown in the given figure. What will be the respective readings shown by V₁, V₂,and V₃?

12033.

Use the following information to answer the next question. Bittoo connects three resistors R, 2R, and 4R in parallel and connects them to a battery. He then connects three voltmeters V1, V2, and V3 across these resistors, as shown in the given figure. What will be the respective readings shown by V1, V2,and V3?

Answer»

Use the following information to answer the next question.

Bittoo connects three resistors R, 2R, and 4R in parallel and connects them to a battery. He then connects three voltmeters V₁, V₂, and V₃ across these resistors, as shown in the given figure.

What will be the respective readings shown by V₁, V₂,and V₃?

Discussion

12034.	The magnetic field inside a long straight solenoid carrying current
Answer» The magnetic field inside a long straight solenoid carrying current

Discussion

12035.	A bullet of mass 0.050 kg travelling at 300 ms−1 penetrates inside a wooden block of 3 kg. The block now embedded with the bullet start moving together. What will be the combined velocity of the block and the bullet?
Answer» A bullet of mass $0.050 k g$ travelling at $300 m s^{- 1}$ penetrates inside a wooden block of $3 k g$ . The block now embedded with the bullet start moving together. What will be the combined velocity of the block and the bullet?

Discussion

12036.	The relative density of silver is 10.8. The density of water is 1000 kg/m3. The density of silver is:
Answer» The relative density of silver is 10.8. The density of water is 1000 kg/m³. The density of silver is:

Discussion

12037.	What is the formula for potential due to a point charge?
Answer» What is the formula for potential due to a point charge?

Discussion

12038.	The rear side of truck is open and a box of 40 kg mass is placed 5m away from its open end. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2m/s2. At what distance from the starting point of the truck does the box fall off (ignore the size of the box)? ___
Answer» The rear side of truck is open and a box of 40 kg mass is placed 5m away from its open end. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2m/s $^{2}$ . At what distance from the starting point of the truck does the box fall off (ignore the size of the box)? ___

12038.

The rear side of truck is open and a box of 40 kg mass is placed 5m away from its open end. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2m/s2. At what distance from the starting point of the truck does the box fall off (ignore the size of the box)? ___

Answer»

The rear side of truck is open and a box of 40 kg mass is placed 5m away from its open end. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2m/s $^{2}$ . At what distance from the starting point of the truck does the box fall off (ignore the size of the box)?

___

Discussion

12039.	A boy of mass 50 kg slides down a wooden plank from a height of 500 cm. Assuming there is no friction, calculate the speed with which the boy will reach the ground.
Answer» A boy of mass 50 kg slides down a wooden plank from a height of 500 cm. Assuming there is no friction, calculate the speed with which the boy will reach the ground.

Discussion

12040.	A book is placed on a table such that it does not fall. Which force is responsible for this?
Answer» A book is placed on a table such that it does not fall. Which force is responsible for this?

Discussion

12041.	A bus moving along a straight line at 20 m/s undergoes an acceleration of 4m/s2. After 2 seconds, its speed will be : (a) 8 m/s (b) 12 m/s (c) 16 m/s (d) 28 m/s
Answer» A bus moving along a straight line at 20 m/s undergoes an acceleration of 4 $m / s^{2}$ . After 2 seconds, its speed will be : (a) 8 m/s (b) 12 m/s (c) 16 m/s (d) 28 m/s

12041.

A bus moving along a straight line at 20 m/s undergoes an acceleration of 4m/s2. After 2 seconds, its speed will be : (a) 8 m/s (b) 12 m/s (c) 16 m/s (d) 28 m/s

Answer»

A bus moving along a straight line at 20 m/s undergoes an acceleration of 4 $m / s^{2}$ . After 2 seconds, its speed will be :

(a) 8 m/s

(b) 12 m/s

(c) 16 m/s

(d) 28 m/s

Discussion

12042.	A body is thrown vertically upwards and rises to a height of 10m. The velocity with which the body was thrown upwards is: (g=9.8ms2)
Answer» A body is thrown vertically upwards and rises to a height of 10m. The velocity with which the body was thrown upwards is: ( $g = 9.8 {\frac{m}{s}}^{2}$ )

Discussion

12043.	A wooden block floats in water with two-third of its volume submerged. (a) Calculate the density of wood. (b) When the same block is placed on oil, three-quarter of its volume is immersed in oil. Calculate the density of oil.
Answer» A wooden block floats in water with two-third of its volume submerged. (a) Calculate the density of wood. (b) When the same block is placed on oil, three-quarter of its volume is immersed in oil. Calculate the density of oil.

12043.

A wooden block floats in water with two-third of its volume submerged. (a) Calculate the density of wood. (b) When the same block is placed on oil, three-quarter of its volume is immersed in oil. Calculate the density of oil.

Answer»

A wooden block floats in water with two-third of its volume submerged.

(a) Calculate the density of wood.
(b) When the same block is placed on oil, three-quarter of its volume is immersed in oil. Calculate the density of oil.

Discussion

12044.	The property of inertia is more in : (a) a car (b) a truck (c) a horse cart (d) a toy car.
Answer» The property of inertia is more in : (a) a car (b) a truck (c) a horse cart (d) a toy car.

Discussion

12045.	Which of these isn't a leap year?
Answer» Which of these isn't a leap year?

Discussion

12046.	This question is off syllabus but what is expanding of universe and what and how is this phenomenon happening is anybody there to explain me
Answer» This question is off syllabus but what is expanding of universe and what and how is this phenomenon happening is anybody there to explain me

Discussion

12047.	Cells which are used in mobile phones are
Answer» Cells which are used in mobile phones are

Discussion

12048.	The light ray passing through the centre of curvature, after hitting the mirror will reflect at an angle of ______ with respect to the normal.
Answer» The light ray passing through the centre of curvature, after hitting the mirror will reflect at an angle of ______ with respect to the normal.

Discussion

12049.	Explain the concept of intensity and loudness of sound
Answer» Explain the concept of intensity and loudness of sound

Discussion

12050.	If matter cannot be created nor destroyed then how the universe or the multiverse came into existence from nothing? Because if the universe is existing then there should be a starting and a ending point.
Answer» If matter cannot be created nor destroyed then how the universe or the multiverse came into existence from nothing? Because if the universe is existing then there should be a starting and a ending point.

Discussion

Explore topic-wise InterviewSolutions in .

Which of the conditions shows that the particles are in equilibrium state for two forces F1and F2 acting on the body?

A person standing between two vertical cliffs and 640m away from the nearest cliff shouted. He heard the first echo after 4 seconds and the second echo 3 seconds later. Calculate the distance between the cliffs.

A truck is moving with a certain uniform velocity. It is accelerated uniformly by 0.75m/s2. After 20 seconds, the velocity of the truck becomes 72 km/h. What is the initial velocity of the truck?

If time period of SHM of system as shown in figure is T=2π√mmk then value of n is

How much work is done when a force of 1 N moves a body through a distance of 1m in its own direction?

Choose the correct option. 1.Tonei.Frequencies that are integral multiple of fundamental frequency.2.Noteii.Sound of single frequency.3.Overtoneiii.Sound of multiple frequencies.4.Harmoniciv.Higher frequencies other than fundamental frequency.

The buoyant force always acts in ___ direction. (If the weight is acting downwards)?

A boy was playing with a spongy ball, compressing and releasing it. What will be the work done by the boy on the ball and the ball on the boy respectively at the time of compressing?

If the radius of the earth shrinks by 4% and there is no change in its mass then by how much does the value of g change? ( Given for x&lt;&lt;1 , assume 1(1−x)2≈1+2x)

An object is put one by one in 3 liquids having different densities. The object floats with 19, 211 and 37 parts of their volumes outside the liquid surface in liquids of densities d1, d2 and d3 respectively. Arrange the densities in ascending order of their magnitude.

The velocity of water in a river is 18 km h-1 near the surface. If the river is 5 m deep, find the shearing stress between the horizontal layers of water. The coefficient of viscosity of water = 10-2 poise.

The graph shows the variation of speed of a car with time. Find the distance travelled in first 8 hours. (Given: E = 3 seconds and G = 35 kmph).

A stone of mass m is tied to a string of length I and rotated in a circle with a constant speed v. If the string is released, the stone flies

What kind of energy is the energy of the motion of an avalanche?

The S.I. unit of pressure is : (a) N cm−2 (b) Pa (c) N (d) N m2

A force of 15 N acts on a body of mass 2 kg. Calculate the acceleration produced.

A boy throws a ball along the flat ground. The ball slows down after traveling a distance. What is the opposing force, acting on the ball, that brought it to rest?

Which of the following factors does the speed of sound in a medium depend upon?

A micrometre screw gauge has a negative zero error of 0.0018 cm. The main scale reading is 3.6 cm for an object. The baseline coincides with the 45th division of the circular scale. Calculate the true length of the object in cm.

an object is dropped from the top of a tower distance it covers in last second is 7 times the distance it covered in the first second find time of flight?

What causes sound?

How can seat belts helps us ??

Charges 2Q and -Q are placed at certain distance. The point where the electric field will be zero is? a)somewhere between -Q and 2Q b)on the left of -Q c)on the right of 2Q d)on the right bisector of line joining 2Q and -Q

A coin of 10g is falling into a pool of water. If the buoyant force on the coin is 0.09N. What is the acceleration of the fall?

Forces always occurs in pairs from which law can we conclude the above statement. Give 2 example to support your answer. ​​​​​ ​​​​​​

Which of these is false?

Derive the formula s=it+1/2at2

A coin and a piece of paper are dropped simultaneously from the same height . which of them will touch the ground first and why?

A car is traveling at 36km/h if it's velocity increase to 73km/h in five s than find the acceleration of the car in SI UNIT

The work done by the string of a simple pendulum in S.H.M is

What is the effective length of a second's pendulum for a place where g = 9.8 m s−2? [Given: The time period of a seconds' pendulum = 2 s]

A pump raises water by spending 4×105 J of energy in 10 s. Find the power of pump.

The magnetic field inside a long straight solenoid carrying current

A bullet of mass 0.050 kg travelling at 300 ms−1 penetrates inside a wooden block of 3 kg. The block now embedded with the bullet start moving together. What will be the combined velocity of the block and the bullet?

The relative density of silver is 10.8. The density of water is 1000 kg/m3. The density of silver is:

What is the formula for potential due to a point charge?

A boy of mass 50 kg slides down a wooden plank from a height of 500 cm. Assuming there is no friction, calculate the speed with which the boy will reach the ground.

A book is placed on a table such that it does not fall. Which force is responsible for this?

A bus moving along a straight line at 20 m/s undergoes an acceleration of 4m/s2. After 2 seconds, its speed will be : (a) 8 m/s (b) 12 m/s (c) 16 m/s (d) 28 m/s

A body is thrown vertically upwards and rises to a height of 10m. The velocity with which the body was thrown upwards is: (g=9.8ms2)

A wooden block floats in water with two-third of its volume submerged. (a) Calculate the density of wood. (b) When the same block is placed on oil, three-quarter of its volume is immersed in oil. Calculate the density of oil.

The property of inertia is more in : (a) a car (b) a truck (c) a horse cart (d) a toy car.

Which of these isn't a leap year?

This question is off syllabus but what is expanding of universe and what and how is this phenomenon happening is anybody there to explain me

Cells which are used in mobile phones are

The light ray passing through the centre of curvature, after hitting the mirror will reflect at an angle of ______ with respect to the normal.

Explain the concept of intensity and loudness of sound

If matter cannot be created nor destroyed then how the universe or the multiverse came into existence from nothing? Because if the universe is existing then there should be a starting and a ending point.

If the radius of the earth shrinks by 4% and there is no change in its mass then by how much does the value of g change? ( Given for x<<1 , assume 1(1−x)2≈1+2x)

Forces always occurs in pairs from which law can we conclude the above statement. Give 2 example to support your answer.