13232 + Interview Questions in Physics Page 135 InterviewSolution

6701.	Reason of weightlessness in a satellite is:
Answer» Reason of weightlessness in a satellite is:

Discussion

6702.	Write the difference between uniform acceleration and non uniform acceleration.
Answer» Write the difference between uniform acceleration and non uniform acceleration.

Discussion

6703.	I did not understand the numericals of vernier caliper and srew gauge
Answer» I did not understand the numericals of vernier caliper and srew gauge

Discussion

6704.	The biggest optical telescope in India is situated at ___.
Answer» The biggest optical telescope in India is situated at ___.

Discussion

6705.	A motorcycle has a velocity of 15 m/s, due south (observed by a police officer standing on the side of the road) as it passes a car with a velocity of 24 m/s, due north. The same officer observes the velocity of the car. What is the magnitude and direction of the velocity of the motorcycle as seen by the driver of the car?
Answer» A motorcycle has a velocity of 15 m/s, due south (observed by a police officer standing on the side of the road) as it passes a car with a velocity of 24 m/s, due north. The same officer observes the velocity of the car. What is the magnitude and direction of the velocity of the motorcycle as seen by the driver of the car?

Discussion

6706.	26.Two springs A and B are streched by applying forces of equal magnitude at the four ends . If the energy stored in A is E in B is
Answer» 26.Two springs A and B are streched by applying forces of equal magnitude at the four ends . If the energy stored in A is E in B is

Discussion

6707.	(a) A totally reflecting. small plane mirror placed horizontally face a parallel beam of light as shown in { figure. The mass of the mirror is 20g . Assume that { there is no absorption in the lens and that 30% of the light emitted by the source goes through the lens. Find the power of the source needed to support the weight { of the mirror. Take g=10m/sec^2 . { of the mirror. Take g=10m/sec^2 . {\qquad\quad
Answer» (a) A totally reflecting. small plane mirror placed horizontally face a parallel beam of light as shown in { figure. The mass of the mirror is 20g . Assume that { there is no absorption in the lens and that 30% of the light emitted by the source goes through the lens. Find the power of the source needed to support the weight { of the mirror. Take g=10m/sec^2 . { of the mirror. Take g=10m/sec^2 . {\qquad\quad

Discussion

6708.	A stone with weight w is thrown vertically upward into air from ground level with initial speed vo. If a constant force f due to drag acts on stone throughout its flight. The maximum height attained by the stone is
Answer» A stone with weight w is thrown vertically upward into air from ground level with initial speed vo. If a constant force f due to drag acts on stone throughout its flight. The maximum height attained by the stone is

Discussion

6709.	Ursa major is visible during which season of the year?
Answer» Ursa major is visible during which season of the year?

Discussion

6710.	A bulb is connected across a potential difference of 12 V. The current flowing in the circuit is 2 A. What is the resistance offered?
Answer» A bulb is connected across a potential difference of $12 V$ . The current flowing in the circuit is $2 A$ . What is the resistance offered?

Discussion

6711.	Wahi is vector laws?Does all quantity have magnitude?
Answer» Wahi is vector laws?Does all quantity have magnitude?

Discussion

6712.	A particle of mass M and radius of gyration K is rotating with angular acceleration alpha . the torque acting on the particle is ?
Answer» A particle of mass M and radius of gyration K is rotating with angular acceleration alpha . the torque acting on the particle is ?

Discussion

6713.	in a system of units ,the unit of mass is 1000kg,length is 10km and the unit of time is 1minute. 1J in this system is equal to
Answer» in a system of units ,the unit of mass is 1000kg,length is 10km and the unit of time is 1minute. 1J in this system is equal to

Discussion

6714.	the period of oscillation of a magnet of a vibration magnetometer is 2.45 s at one place and 4.9 sat other the ratio of horizontal component of earth magnetic field at the two places is
Answer» the period of oscillation of a magnet of a vibration magnetometer is 2.45 s at one place and 4.9 sat other the ratio of horizontal component of earth magnetic field at the two places is

Discussion

6715.	Fill in the blanks with the correct connectors. Light pollution may seem comparatively harmless when compared to other types of pollution. (a) ________ it has very serious repercussions. A hundred years ago, people could see clusters of a stellar spectacle in the sky. (b) ________, today we can only imagine how it looked.
Answer» Fill in the blanks with the correct connectors. Light pollution may seem comparatively harmless when compared to other types of pollution. (a) ________ it has very serious repercussions. A hundred years ago, people could see clusters of a stellar spectacle in the sky. (b) ________, today we can only imagine how it looked.

6715.

Fill in the blanks with the correct connectors. Light pollution may seem comparatively harmless when compared to other types of pollution. (a) it has very serious repercussions. A hundred years ago, people could see clusters of a stellar spectacle in the sky. (b) , today we can only imagine how it looked.

Answer»

Fill in the blanks with the correct connectors.

Light pollution may seem comparatively harmless when compared to other types of pollution. (a) ________ it has very serious repercussions. A hundred years ago, people could see clusters of a stellar spectacle in the sky. (b) ________, today we can only imagine how it looked.

Discussion

6716.	From a point A,80m above the ground ,a particle is projected vertically upwards with a velocity of 29.4m/s.5sec later another particle is dropped from a point B 34.3m vertically below A.Determine when and where one overtake the other Take g=9.8m/
Answer» From a point A,80m above the ground ,a particle is projected vertically upwards with a velocity of 29.4m/s.5sec later another particle is dropped from a point B 34.3m vertically below A.Determine when and where one overtake the other Take g=9.8m/

Discussion

6717.	What are the precautions that should be taken care of while drawing ray diagrams while two mirrors are placed parallel to each other and in the second case they are placed perpendicular to each other....??
Answer» What are the precautions that should be taken care of while drawing ray diagrams while two mirrors are placed parallel to each other and in the second case they are placed perpendicular to each other....??

Discussion

6718.	Describe the principle, construction and working of DC motor in detail.
Answer» Describe the principle, construction and working of DC motor in detail.

Discussion

6719.	(a) What is an echo? How is echo formed?(b) What is the minimum distance in the air required from a sound reflecting surface to hear an echo (at 20° C)?
Answer» (a) What is an echo? How is echo formed? (b) What is the minimum distance in the air required from a sound reflecting surface to hear an echo (at 20° C)?

Discussion

6720.	A box of mass 3 kg is lifted diagonally from point A to point B as shown in the given figure. Given that the acceleration due to gravity is 10 ms−2, what is the gravitational potential energy gained by the box?
Answer» A box of mass $3 k g$ is lifted diagonally from point A to point B as shown in the given figure. Given that the acceleration due to gravity is $10 m s^{- 2}$ , what is the gravitational potential energy gained by the box?

Discussion

6721.	Why pressure exerted in any confined mass of fluid is transmitted indiminished in all directions
Answer» Why pressure exerted in any confined mass of fluid is transmitted indiminished in all directions

Discussion

6722.	State the SI unit of work.
Answer» State the SI unit of work.

Discussion

6723.	a) A train travels a distance with a speed of 40 km/h and returns with a speed of 60 km/h. Calculate the average speed of the train. b) On a 60 km track, a train travels the first 30 km at a uniform speed of 30 km/h. How fast must a train travel the next 30 km so that the average speed is 40 km/hr for the entire trip?
Answer» a) A train travels a distance with a speed of 40 km/h and returns with a speed of 60 km/h. Calculate the average speed of the train. b) On a 60 km track, a train travels the first 30 km at a uniform speed of 30 km/h. How fast must a train travel the next 30 km so that the average speed is 40 km/hr for the entire trip?

6723.

a) A train travels a distance with a speed of 40 km/h and returns with a speed of 60 km/h. Calculate the average speed of the train. b) On a 60 km track, a train travels the first 30 km at a uniform speed of 30 km/h. How fast must a train travel the next 30 km so that the average speed is 40 km/hr for the entire trip?

Answer»

a) A train travels a distance with a speed of 40 km/h and returns with a speed of 60 km/h. Calculate the average speed of the train.

b) On a 60 km track, a train travels the first 30 km at a uniform speed of 30 km/h. How fast must a train travel the next 30 km so that the average speed is 40 km/hr for the entire trip?

Discussion

6724.	A particle moves in a straight line so that distance S is equal to T^1/2 where T is time then its acceleration is proportional to?
Answer» A particle moves in a straight line so that distance S is equal to T^1/2 where T is time then its acceleration is proportional to?

Discussion

6725.	A force of 20 N displaces a body through a distance of 1 m at an angle of 60° from its own direction. Calculate the amount of work done.
Answer» A force of 20 N displaces a body through a distance of 1 m at an angle of 60° from its own direction. Calculate the amount of work done.

Discussion

6726.	The pitch of a screw gauge is 1mm and there are 50 divisions on its cap. When nothing is put in between the studs , 44th division of circular scale coincides with reference line. When a glass plate is placed between the studs, the main scale reads three divisions and the circular scale reads 26 division. The thickness of the plate is-
Answer» The pitch of a screw gauge is 1mm and there are 50 divisions on its cap. When nothing is put in between the studs , 44th division of circular scale coincides with reference line. When a glass plate is placed between the studs, the main scale reads three divisions and the circular scale reads 26 division. The thickness of the plate is-

Discussion

6727.	(a) Define momentum of a body. On what factors does the momentum of a body depend?(b) Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.
Answer» (a) Define momentum of a body. On what factors does the momentum of a body depend? (b) Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.

Discussion

6728.	How is sound wave produced?
Answer» How is sound wave produced?

Discussion

6729.	A car travels from a point A to B at a constant speed of 50 km/h On return journey along the same path it travel at a constant speed of 40 km/h Find its distance and average speed.
Answer» A car travels from a point A to B at a constant speed of 50 km/h On return journey along the same path it travel at a constant speed of 40 km/h Find its distance and average speed.

Discussion

6730.	In the circuit shown in figure, if C1=C2=2 μF ,then charges present on C1 and C2 will be
Answer» In the circuit shown in figure, if $C_{1} = C_{2} = 2 μ F$ ,then charges present on $C_{1} and C_{2}$ will be

Discussion

6731.	If relative density is 11.3, the density of the substance in SI units is
Answer» If relative density is 11.3, the density of the substance in SI units is

Discussion

6732.	State the relation between g and G on earth.
Answer» State the relation between g and G on earth.

Discussion

6733.	when a ball hits a wall and bounces back, sue to it change in monmentum, it experiences a force. a qequal force is exerted on the wall. then why there is no change in momentum of the wall. is tbis a failyr of newton 2nd law
Answer» when a ball hits a wall and bounces back, sue to it change in monmentum, it experiences a force. a qequal force is exerted on the wall. then why there is no change in momentum of the wall. is tbis a failyr of newton 2nd law

Discussion

6734.	A venturimeter is installed in a horizontal pipe of 60 mm diameter & throat diameter of 20 mm. A venturimeter is used to measure the velocity of water in a pipe. if pipe & thorat pressure difference is 50 kPa then flow velocity (in m/s) is(neglect frictional losses)
Answer» A venturimeter is installed in a horizontal pipe of $60 m m$ diameter & throat diameter of $20 m m$ . A venturimeter is used to measure the velocity of water in a pipe. if pipe & thorat pressure difference is $50 k P a$ then flow velocity $(i n m / s$ ) is (neglect frictional losses)

Discussion

6735.	an object floats in water with 20% volume outside the water surface. What % of volume of the same body will be outside the liquid surface whose relative density is 5.
Answer» an object floats in water with 20% volume outside the water surface. What % of volume of the same body will be outside the liquid surface whose relative density is 5.

Discussion

6736.	What will be the number of electrons passing through a heater wire in one minute, if it carries a current of 8 A?
Answer» What will be the number of electrons passing through a heater wire in one $minute$ , if it carries a current of $8 A$ ?

Discussion

6737.	65.The length of an elastic string is A meters when the tension is 4N and B meters when tension is 5N. The length in meters when the tension is 9N
Answer» 65.The length of an elastic string is A meters when the tension is 4N and B meters when tension is 5N. The length in meters when the tension is 9N

Discussion

6738.	What are electromagnetic radiation explain briefly
Answer» What are electromagnetic radiation explain briefly

Discussion

6739.	If F1 is the magnitude of the force exerted on the Sun by Earth and F2 is the magnitude of the force exerted on Earth by the Sun, then :
Answer» If $F_{1}$ is the magnitude of the force exerted on the Sun by Earth and $F_{2}$ is the magnitude of the force exerted on Earth by the Sun, then :

Discussion

6740.	ntthe accleration of a body moving along x axis is given by a=4x where a is in m/sand x is in meter. if at x=0, the velocity of the body is 2m/s, then find its velocity at x=4m.n
Answer» ntthe accleration of a body moving along x axis is given by a=4x where a is in m/sand x is in meter. if at x=0, the velocity of the body is 2m/s, then find its velocity at x=4m.n

Discussion

6741.	The refractive index of glass with respect to water is 9/8.If the velocity and wave length of light in glass are 2* 10power 8and 4000A respectively .then the velocity and wave length of light in water are
Answer» The refractive index of glass with respect to water is 9/8.If the velocity and wave length of light in glass are 2* 10power 8and 4000A respectively .then the velocity and wave length of light in water are

Discussion

6742.	A child moves around the circumference of a merry-go-round and completes a round in 5 seconds. How much time will it take for him to travel along the diameter and come back?
Answer» A child moves around the circumference of a merry-go-round and completes a round in 5 seconds. How much time will it take for him to travel along the diameter and come back?

6742.

A child moves around the circumference of a merry-go-round and completes a round in 5 seconds. How much time will it take for him to travel along the diameter and come back?

Answer»

A child moves around the circumference of a merry-go-round and completes a round in 5 seconds. How much time will it take for him to travel along the diameter and come back?

Discussion

6743.	The charge of an electron is 1.6×10−19 C. How many electrons strike the screen of a cathode ray tube each second when the beam current is 16 mA?
Answer» The charge of an electron is $1.6 \times 10^{- 19} C$ . How many electrons strike the screen of a cathode ray tube each $second$ when the beam current is $16 mA$ ?

Discussion

6744.	Hii I not get understand velocity and a difference between velocity and displacement so please explain it 😊😊
Answer» Hii I not get understand velocity and a difference between velocity and displacement so please explain it 😊😊

Discussion

6745.	certain amount of water in 15 minutes and other heater coil same amount of water in 10 minutes time taken to boil same amount of water when both are used in parallel is
Answer» certain amount of water in 15 minutes and other heater coil same amount of water in 10 minutes time taken to boil same amount of water when both are used in parallel is

Discussion

6746.	Hydrogen and oxygen combines in the ratio of 1:8 by weight to form water (H2O). How many times an atom of oxygen must weigh the mass of hydrogen atom?
Answer» Hydrogen and oxygen combines in the ratio of 1:8 by weight to form water (H2O). How many times an atom of oxygen must weigh the mass of hydrogen atom?

Discussion

6747.	119. A wire is elongated by 2 mm when a brick is suspended from it . When the brick is immersed in water , the wire contracts by 0.6 mm. What is the density of brick ? a) 3333 kg/m3 b)4210 kg/m3 c) 5000 kg/m3 d)2000 kg/m3
Answer» 119. A wire is elongated by 2 mm when a brick is suspended from it . When the brick is immersed in water , the wire contracts by 0.6 mm. What is the density of brick ? a) 3333 kg/m3 b)4210 kg/m3 c) 5000 kg/m3 d)2000 kg/m3

Discussion

6748.	Four resistors are connected in parallel. Each resistors has a resistance of 2 Ω. The effective resistance of the combination is:
Answer» Four resistors are connected in parallel. Each resistors has a resistance of $2 Ω$ . The effective resistance of the combination is:

6748.

Four resistors are connected in parallel. Each resistors has a resistance of 2 Ω. The effective resistance of the combination is:

Answer»

Four resistors are connected in parallel. Each resistors has a resistance of $2 Ω$ . The effective resistance of the combination is:

Discussion

6749.	What games do you play with your friends? Can you walk and make sounds like an elephant?
Answer» What games do you play with your friends? Can you walk and make sounds like an elephant?

Discussion

6750.	A ball is thrown in xy plane undergoes a projectile with velocity u and angle theta with the horizontal. Draw the following graphs:KE-t y-t. X-t acc-t KE-h PE-hPE-t. Slope of path vs xSlope of path vs time
Answer» A ball is thrown in xy plane undergoes a projectile with velocity u and angle theta with the horizontal. Draw the following graphs: KE-t y-t. X-t acc-t KE-h PE-h PE-t. Slope of path vs x Slope of path vs time

Discussion

Explore topic-wise InterviewSolutions in .

Reason of weightlessness in a satellite is:

Write the difference between uniform acceleration and non uniform acceleration.

I did not understand the numericals of vernier caliper and srew gauge

The biggest optical telescope in India is situated at ___.

26.Two springs A and B are streched by applying forces of equal magnitude at the four ends . If the energy stored in A is E in B is

A stone with weight w is thrown vertically upward into air from ground level with initial speed vo. If a constant force f due to drag acts on stone throughout its flight. The maximum height attained by the stone is

Ursa major is visible during which season of the year?

A bulb is connected across a potential difference of 12 V. The current flowing in the circuit is 2 A. What is the resistance offered?

Wahi is vector laws?Does all quantity have magnitude?

A particle of mass M and radius of gyration K is rotating with angular acceleration alpha . the torque acting on the particle is ?

in a system of units ,the unit of mass is 1000kg,length is 10km and the unit of time is 1minute. 1J in this system is equal to

the period of oscillation of a magnet of a vibration magnetometer is 2.45 s at one place and 4.9 sat other the ratio of horizontal component of earth magnetic field at the two places is

From a point A,80m above the ground ,a particle is projected vertically upwards with a velocity of 29.4m/s.5sec later another particle is dropped from a point B 34.3m vertically below A.Determine when and where one overtake the other Take g=9.8m/

What are the precautions that should be taken care of while drawing ray diagrams while two mirrors are placed parallel to each other and in the second case they are placed perpendicular to each other....??

Describe the principle, construction and working of DC motor in detail.

(a) What is an echo? How is echo formed?(b) What is the minimum distance in the air required from a sound reflecting surface to hear an echo (at 20° C)?

A box of mass 3 kg is lifted diagonally from point A to point B as shown in the given figure. Given that the acceleration due to gravity is 10 ms−2, what is the gravitational potential energy gained by the box?

Why pressure exerted in any confined mass of fluid is transmitted indiminished in all directions

State the SI unit of work.

A particle moves in a straight line so that distance S is equal to T^1/2 where T is time then its acceleration is proportional to?

A force of 20 N displaces a body through a distance of 1 m at an angle of 60° from its own direction. Calculate the amount of work done.

(a) Define momentum of a body. On what factors does the momentum of a body depend?(b) Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.

How is sound wave produced?

A car travels from a point A to B at a constant speed of 50 km/h On return journey along the same path it travel at a constant speed of 40 km/h Find its distance and average speed.

In the circuit shown in figure, if C1=C2=2 μF ,then charges present on C1 and C2 will be

If relative density is 11.3, the density of the substance in SI units is

State the relation between g and G on earth.

when a ball hits a wall and bounces back, sue to it change in monmentum, it experiences a force. a qequal force is exerted on the wall. then why there is no change in momentum of the wall. is tbis a failyr of newton 2nd law

A venturimeter is installed in a horizontal pipe of 60 mm diameter &amp; throat diameter of 20 mm. A venturimeter is used to measure the velocity of water in a pipe. if pipe &amp; thorat pressure difference is 50 kPa then flow velocity (in m/s) is(neglect frictional losses)

an object floats in water with 20% volume outside the water surface. What % of volume of the same body will be outside the liquid surface whose relative density is 5.

What will be the number of electrons passing through a heater wire in one minute, if it carries a current of 8 A?

65.The length of an elastic string is A meters when the tension is 4N and B meters when tension is 5N. The length in meters when the tension is 9N

What are electromagnetic radiation explain briefly

If F1 is the magnitude of the force exerted on the Sun by Earth and F2 is the magnitude of the force exerted on Earth by the Sun, then :

ntthe accleration of a body moving along x axis is given by a=4x where a is in m/sand x is in meter. if at x=0, the velocity of the body is 2m/s, then find its velocity at x=4m.n

The refractive index of glass with respect to water is 9/8.If the velocity and wave length of light in glass are 2* 10power 8and 4000A respectively .then the velocity and wave length of light in water are

A child moves around the circumference of a merry-go-round and completes a round in 5 seconds. How much time will it take for him to travel along the diameter and come back?

The charge of an electron is 1.6×10−19 C. How many electrons strike the screen of a cathode ray tube each second when the beam current is 16 mA?

Hii I not get understand velocity and a difference between velocity and displacement so please explain it 😊😊

certain amount of water in 15 minutes and other heater coil same amount of water in 10 minutes time taken to boil same amount of water when both are used in parallel is

Hydrogen and oxygen combines in the ratio of 1:8 by weight to form water (H2O). How many times an atom of oxygen must weigh the mass of hydrogen atom?

119. A wire is elongated by 2 mm when a brick is suspended from it . When the brick is immersed in water , the wire contracts by 0.6 mm. What is the density of brick ? a) 3333 kg/m3 b)4210 kg/m3 c) 5000 kg/m3 d)2000 kg/m3

Four resistors are connected in parallel. Each resistors has a resistance of 2 Ω. The effective resistance of the combination is:

What games do you play with your friends? Can you walk and make sounds like an elephant?

A ball is thrown in xy plane undergoes a projectile with velocity u and angle theta with the horizontal. Draw the following graphs:KE-t y-t. X-t acc-t KE-h PE-hPE-t. Slope of path vs xSlope of path vs time

A venturimeter is installed in a horizontal pipe of 60 mm diameter & throat diameter of 20 mm. A venturimeter is used to measure the velocity of water in a pipe. if pipe & thorat pressure difference is 50 kPa then flow velocity (in m/s) is(neglect frictional losses)