13232 + Interview Questions in Physics Page 186 InterviewSolution

9251.	If the temperature of the gas increases then speed of sound in the gas ___.
Answer» If the temperature of the gas increases then speed of sound in the gas ___.

Discussion

9252.	What is the least time interval required to hear a distinct echo?
Answer» What is the least time interval required to hear a distinct echo?

Discussion

9253.	Is horizontal range 'R' R = ut Where u is initial velocity and t is time.
Answer» Is horizontal range 'R' R = ut Where u is initial velocity and t is time.

9253.

Is horizontal range 'R' R = ut Where u is initial velocity and t is time.

Answer»

Is horizontal range 'R'

R = ut

Where u is initial velocity and t is time.

Discussion

9254.	A train takes 2 hours to reach station B from station A and 3 hours to reach back to A. Stations A and B are separated by a distance of 400 km. What is the average speed and velocity of the train?
Answer» A train takes 2 hours to reach station B from station A and 3 hours to reach back to A. Stations A and B are separated by a distance of 400 km. What is the average speed and velocity of the train?

Discussion

9255.	Name the properties of ultrasound that makes it suitable for echosounding......?? PLEASE HELP ME AS SOON AS POSSIBLE...... PLS
Answer» Name the properties of ultrasound that makes it suitable for echosounding......?? PLEASE HELP ME AS SOON AS POSSIBLE...... PLS

Discussion

9256.	With reference to specifying the magnetic field, which of the following physical quantities is not an “element” of the earth’s magnetic field?
Answer» With reference to specifying the magnetic field, which of the following physical quantities is not an “element” of the earth’s magnetic field?

Discussion

9257.	Which constellation appears like a big ladle?
Answer» Which constellation appears like a big ladle?

Discussion

9258.	A car takes 4hrs to travel from Bangalore to Chennai whereas the flight takes only 30min to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is 400km and the air is 150km. Calculate the average speed and average velocity of flight and car assuming the path of the aeroplane to be a straight line. Answer in the given order (in kmhr ): Average Speed of Flight, Average velocity of Flight, Average speed of car, Average velocity of car.
Answer» A car takes 4hrs to travel from Bangalore to Chennai whereas the flight takes only 30min to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is 400km and the air is 150km. Calculate the average speed and average velocity of flight and car assuming the path of the aeroplane to be a straight line. Answer in the given order (in $\frac{k m}{h r}$ ): Average Speed of Flight, Average velocity of Flight, Average speed of car, Average velocity of car.

9258.

A car takes 4hrs to travel from Bangalore to Chennai whereas the flight takes only 30min to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is 400km and the air is 150km. Calculate the average speed and average velocity of flight and car assuming the path of the aeroplane to be a straight line. Answer in the given order (in kmhr ): Average Speed of Flight, Average velocity of Flight, Average speed of car, Average velocity of car.

Answer»

A car takes 4hrs to travel from Bangalore to Chennai whereas the flight takes only 30min to travel from Bangalore to Chennai. If the distance from Bangalore to Chennai by road is 400km and the air is 150km. Calculate the average speed and average velocity of flight and car assuming the path of the aeroplane to be a straight line.

Answer in the given order (in $\frac{k m}{h r}$ ):

Average Speed of Flight, Average velocity of Flight, Average speed of car, Average velocity of car.

Discussion

9259.	If the velocity of a moving car is halved, its kinetic energy would
Answer» If the velocity of a moving car is halved, its kinetic energy would

Discussion

9260.	SI unit of surface tension is:
Answer» SI unit of surface tension is:

Discussion

9261.	What is meant by the term retardation ? Name its S.I. unit.
Answer» What is meant by the term retardation ? Name its S.I. unit.

Discussion

9262.	What is Sonar? Explain the working and application of Sonar. [5 MARKS]
Answer» What is Sonar? Explain the working and application of Sonar. [5 MARKS]

Discussion

9263.	In a vernier callipers, there are 10 divisions on the vernier scale and 1 cm on the main scale is divided in 10 parts. While measuring a length, the zero of the vernier lies just ahead of 1.8 cm mark and 4th division of vernier coincides with a main scale division. (a) Find the length. (b) If zero error of vernier callipers is - 0.02 cm, what is the correct length ?
Answer» In a vernier callipers, there are 10 divisions on the vernier scale and 1 cm on the main scale is divided in 10 parts. While measuring a length, the zero of the vernier lies just ahead of 1.8 cm mark and 4th division of vernier coincides with a main scale division. (a) Find the length. (b) If zero error of vernier callipers is - 0.02 cm, what is the correct length ?

9263.

In a vernier callipers, there are 10 divisions on the vernier scale and 1 cm on the main scale is divided in 10 parts. While measuring a length, the zero of the vernier lies just ahead of 1.8 cm mark and 4th division of vernier coincides with a main scale division. (a) Find the length. (b) If zero error of vernier callipers is - 0.02 cm, what is the correct length ?

Answer»

In a vernier callipers, there are 10 divisions on the vernier scale and 1 cm on the main scale is divided in 10 parts. While measuring a length, the zero of the vernier lies just ahead of 1.8 cm mark and 4th division of vernier coincides with a main scale division.

(a) Find the length.

(b) If zero error of vernier callipers is - 0.02 cm, what is the correct length ?

Discussion

9264.	A metal in which even iron can float is : (a) sodium (b) magnesium (c) mercury (d) manganese
Answer» A metal in which even iron can float is : (a) sodium (b) magnesium (c) mercury (d) manganese

Discussion

9265.	The unit of buoyant force is ___.
Answer» The unit of buoyant force is ___.

Discussion

9266.	Atmospheric pressure is nearly 100KPa. How large does the air in a room exert on one side of a window of dimensions 40 cm×80 cm?
Answer» Atmospheric pressure is nearly 100KPa. How large does the air in a room exert on one side of a window of dimensions $40 c m \times 80 c m$ ?

Discussion

9267.	A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at
Answer» A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at

Discussion

9268.	The liquids shown in figure in the two arms are mercury (specific gravity = 13.6) and water. if the difference of heights of the mercury columns is 2 cm, find the height h of the water column.
Answer» The liquids shown in figure in the two arms are mercury (specific gravity = 13.6) and water. if the difference of heights of the mercury columns is 2 cm, find the height h of the water column.

9268.

The liquids shown in figure in the two arms are mercury (specific gravity = 13.6) and water. if the difference of heights of the mercury columns is 2 cm, find the height h of the water column.

Answer»

The liquids shown in figure in the two arms are mercury (specific gravity = 13.6) and water. if the difference of heights of the mercury columns is 2 cm, find the height h of the water column.

Discussion

9269.	A body of mass 300 g kept at rest breaks into two parts due to internal forces. One part of mass 200 g is found to move at a velocity of 12ms−1towards the east. The velocity of the other part will be? east⇒+ve;west⇒−ve
Answer» A body of mass 300 g kept at rest breaks into two parts due to internal forces. One part of mass 200 g is found to move at a velocity of $12 m s^{-} 1$ towards the east. The velocity of the other part will be? $e a s t \Rightarrow + v e; w e s t \Rightarrow - v e$

9269.

A body of mass 300 g kept at rest breaks into two parts due to internal forces. One part of mass 200 g is found to move at a velocity of 12ms−1towards the east. The velocity of the other part will be? east⇒+ve;west⇒−ve

Answer»

A body of mass 300 g kept at rest breaks into two parts due to internal forces. One part of mass 200 g is found to move at a velocity of $12 m s^{-} 1$ towards the east.

The velocity of the other part will be?

$e a s t \Rightarrow + v e; w e s t \Rightarrow - v e$

Discussion

9270.	Difference between uniform velocitt and uniform aceeleration
Answer» Difference between uniform velocitt and uniform aceeleration

Discussion

9271.	The separation between the masses is tripled. How is the magnitude of gravitational force between them affected? How?
Answer» The separation between the masses is tripled. How is the magnitude of gravitational force between them affected? How?

Discussion

9272.	Why are exposed water pipes lagged with straw during winter.
Answer» Why are exposed water pipes lagged with straw during winter.

Discussion

9273.	Consider two rooms of same size, a normal brick walled room and the other room full of mirrors. If the same lamp is placed in both the rooms, then which room will have more brightness and why? [2 MARKS]
Answer» Consider two rooms of same size, a normal brick walled room and the other room full of mirrors. If the same lamp is placed in both the rooms, then which room will have more brightness and why? [2 MARKS]

Discussion

9274.	It is known that falling apple is attracted towards the Earth. We all know that the apple will also exert an equal and opposite force on the Earth. If so, we don’t observe Earth moving towards the apple, why?
Answer» It is known that falling apple is attracted towards the Earth. We all know that the apple will also exert an equal and opposite force on the Earth. If so, we don’t observe Earth moving towards the apple, why?

Discussion

9275.	A shell of mass 10 kg is fired from a gun of mass 500 kg The gun recoils with a velocity of 5 m/s. Find the muzzle velocity of the shell.
Answer» A shell of mass 10 kg is fired from a gun of mass 500 kg The gun recoils with a velocity of 5 m/s. Find the muzzle velocity of the shell.

Discussion

9276.	Stone drops from the edge of the roof. It passes window 2m high in 0.1 sec. How far is the roof above the top of the window? (takeg=10m/s2)
Answer» Stone drops from the edge of the roof. It passes window 2m high in 0.1 sec. How far is the roof above the top of the window? $(t a k e g = 10 m / s^{2}$ )

Discussion

9277.	The loudness or softness of a sound is determined by:
Answer» The loudness or softness of a sound is determined by:

Discussion

9278.	An object is placed in front of a convex mirror at a distance of 60 m from its pole. Object starts moving towards the mirror at 20 ms−1. Find the average speed of the image for a time interval of 2 s if the focal length of the mirror is 20 m.
Answer» An object is placed in front of a convex mirror at a distance of $60 m$ from its pole. Object starts moving towards the mirror at $20 m s^{- 1}$ . Find the average speed of the image for a time interval of $2 s$ if the focal length of the mirror is $20 m$ .

Discussion

9279.	How are frequency and wavelength related? Give the relation between them.
Answer» How are frequency and wavelength related? Give the relation between them.

Discussion

9280.	How Newton's law is applied on animals?
Answer» How Newton's law is applied on animals?

Discussion

9281.	A body of weight 600N rests on the floor of a lift. The cable of the lift breaks and it suddenly starts falling freely. What will be the force exerted by the floor of the lift on this object?
Answer» A body of weight 600N rests on the floor of a lift. The cable of the lift breaks and it suddenly starts falling freely. What will be the force exerted by the floor of the lift on this object?

Discussion

9282.	Choose the correct statement(s): Statement 1: Unbalanced forces can change the direction of motion of a body. Statement 2: A balanced force is required to accelerate the body. Statement 3: An object moves with a uniform velocity when balanced forces are acting on it or if there is no net force acting on it. Statement 4: Balanced force cannot bring an object at rest to motion.
Answer» Choose the correct statement(s): Statement 1: Unbalanced forces can change the direction of motion of a body. Statement 2: A balanced force is required to accelerate the body. Statement 3: An object moves with a uniform velocity when balanced forces are acting on it or if there is no net force acting on it. Statement 4: Balanced force cannot bring an object at rest to motion.

Discussion

9283.	A basketball is launched with an initial speed of 8.5 m/s and follows the trajectory shown. The ball enters the basket 0.87 sec after it is launched. What are the distances x and y?
Answer» A basketball is launched with an initial speed of 8.5 m/s and follows the trajectory shown. The ball enters the basket 0.87 sec after it is launched. What are the distances x and y?

9283.

A basketball is launched with an initial speed of 8.5 m/s and follows the trajectory shown. The ball enters the basket 0.87 sec after it is launched. What are the distances x and y?

Answer»

A basketball is launched with an initial speed of 8.5 m/s and follows the trajectory shown. The ball enters the basket 0.87 sec after it is launched. What are the distances x and y?

Discussion

9284.	If the intensities of two sounds are in ratio 9:4, what is the ratio of their amplitudes?
Answer» If the intensities of two sounds are in ratio 9:4, what is the ratio of their amplitudes?

Discussion

9285.	If the body A does a work in 20 s and body B does the same work in 40 s then, what is the ratio of their power respectively?
Answer» If the body A does a work in 20 s and body B does the same work in 40 s then, what is the ratio of their power respectively?

Discussion

9286.	Magnetic field lines always form:
Answer» Magnetic field lines always form:

Discussion

9287.	In Snell’s law, sinisinr = v1v2 = constant This constant is called as:
Answer» In Snell’s law, $\frac{sin i}{sin r}$ = $\frac{v_{1}}{v_{2}}$ = constant This constant is called as:

9287.

In Snell’s law, sinisinr = v1v2 = constant This constant is called as:

Answer»

In Snell’s law,

$\frac{sin i}{sin r}$ = $\frac{v_{1}}{v_{2}}$ = constant
This constant is called as:

Discussion

9288.	The three vessels shown in figure have same base area. Equal volumes of a liquid are poured in three vessels. The force on the base will be
Answer» The three vessels shown in figure have same base area. Equal volumes of a liquid are poured in three vessels. The force on the base will be

9288.

The three vessels shown in figure have same base area. Equal volumes of a liquid are poured in three vessels. The force on the base will be

Answer»

The three vessels shown in figure have same base area. Equal volumes of a liquid are poured in three vessels. The force on the base will be

Discussion

9289.	A pressure of 10 Pa acts on an area of 3.0m2. What is the force acting on the area? What force will be exerted by the application of the same pressure if the area is made one-third?
Answer» A pressure of 10 Pa acts on an area of $3.0 m^{2}$ . What is the force acting on the area? What force will be exerted by the application of the same pressure if the area is made one-third?

Discussion

9290.	A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done : (a) by the force applied by the boy ? (b) by the gravitational force of earth ?
Answer» A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done : (a) by the force applied by the boy ? (b) by the gravitational force of earth ?

9290.

A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done : (a) by the force applied by the boy ? (b) by the gravitational force of earth ?

Answer»

A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done :

(a) by the force applied by the boy ?

(b) by the gravitational force of earth ?

Discussion

9291.	A 4 kg projectile is launched vertically from a height of 2 m with an initial speed of 12 ms−1. Find its speed (to nearest integer) when it is at a height of 3 m above the ground.
Answer» A $4 k g$ projectile is launched vertically from a height of $2 m$ with an initial speed of $12 m s^{- 1}$ . Find its speed (to nearest integer) when it is at a height of $3 m$ above the ground.

Discussion

9292.	In a sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after 2.0 s. If the velocity of waves in sea water is 1450 ms−1, find the depth of sunken ship.
Answer» In a sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after 2.0 s. If the velocity of waves in sea water is $1450 {m s}^{- 1}$ , find the depth of sunken ship.

Discussion

9293.	If F1 is the magnitude of force exerted on the Sun by the Earth and F2 is the magnitude of force exerted on the Earth by the Sun, then:
Answer» If $F_{1}$ is the magnitude of force exerted on the Sun by the Earth and $F_{2}$ is the magnitude of force exerted on the Earth by the Sun, then:

Discussion

9294.	Question 15 An apple falls from a tree because of gravitational attraction between the earth and apple. If F1 is the magnitude of force exerted by the earth on the apple and F2 is the magnitude of force exerted by apple on earth, then (a) F1 is very much greater than F2 (b) F2 is very much greater than F1 (c) F1 is only a little greater than F2 (d) F1 and F2 are equal
Answer» Question 15 An apple falls from a tree because of gravitational attraction between the earth and apple. If $F_{1}$ is the magnitude of force exerted by the earth on the apple and $F_{2}$ is the magnitude of force exerted by apple on earth, then (a) $F_{1}$ is very much greater than $F_{2}$ (b) $F_{2}$ is very much greater than $F_{1}$ (c) $F_{1}$ is only a little greater than $F_{2}$ (d) $F_{1}$ and $F_{2}$ are equal

Discussion

9295.	On what factors does the resistance of a conductor depend? [2 MARKS]
Answer» On what factors does the resistance of a conductor depend? [2 MARKS]

Discussion

9296.	What will happen if there are air bubbles are introduced into the barometer tube?
Answer» What will happen if there are air bubbles are introduced into the barometer tube?

Discussion

9297.	Why we can see some dark area on the surface of moon?
Answer» Why we can see some dark area on the surface of moon?

Discussion

9298.	A body is moving in a circular path of radius 0.125 m. If the body covers a distance of one quarter of the circumference of the path in √2 s, what is the velocity of the body in that distance, in m min−1?7.5
Answer» A body is moving in a circular path of radius $0.125 m$ . If the body covers a distance of one quarter of the circumference of the path in $\sqrt{2} s$ , what is the velocity of the body in that distance, in ${m min}^{- 1}$ ? 7.5

Discussion

9299.	What is the value of acceleration due to gravity on the moon?
Answer» What is the value of acceleration due to gravity on the moon?

Discussion

9300.	The value of acceleration due to gravity near the surface of Earth is:
Answer» The value of acceleration due to gravity near the surface of Earth is:

Discussion

Explore topic-wise InterviewSolutions in .

If the temperature of the gas increases then speed of sound in the gas ___.

What is the least time interval required to hear a distinct echo?

Is horizontal range 'R' R = ut Where u is initial velocity and t is time.

A train takes 2 hours to reach station B from station A and 3 hours to reach back to A. Stations A and B are separated by a distance of 400 km. What is the average speed and velocity of the train?

Name the properties of ultrasound that makes it suitable for echosounding......?? PLEASE HELP ME AS SOON AS POSSIBLE...... PLS

With reference to specifying the magnetic field, which of the following physical quantities is not an “element” of the earth’s magnetic field?

Which constellation appears like a big ladle?

If the velocity of a moving car is halved, its kinetic energy would

SI unit of surface tension is:

What is meant by the term retardation ? Name its S.I. unit.

What is Sonar? Explain the working and application of Sonar. [5 MARKS]

A metal in which even iron can float is : (a) sodium (b) magnesium (c) mercury (d) manganese

The unit of buoyant force is ___.

Atmospheric pressure is nearly 100KPa. How large does the air in a room exert on one side of a window of dimensions 40 cm×80 cm?

A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at

The liquids shown in figure in the two arms are mercury (specific gravity = 13.6) and water. if the difference of heights of the mercury columns is 2 cm, find the height h of the water column.

A body of mass 300 g kept at rest breaks into two parts due to internal forces. One part of mass 200 g is found to move at a velocity of 12ms−1towards the east. The velocity of the other part will be? east⇒+ve;west⇒−ve

Difference between uniform velocitt and uniform aceeleration

The separation between the masses is tripled. How is the magnitude of gravitational force between them affected? How?

Why are exposed water pipes lagged with straw during winter.

Consider two rooms of same size, a normal brick walled room and the other room full of mirrors. If the same lamp is placed in both the rooms, then which room will have more brightness and why? [2 MARKS]

It is known that falling apple is attracted towards the Earth. We all know that the apple will also exert an equal and opposite force on the Earth. If so, we don’t observe Earth moving towards the apple, why?

A shell of mass 10 kg is fired from a gun of mass 500 kg The gun recoils with a velocity of 5 m/s. Find the muzzle velocity of the shell.

Stone drops from the edge of the roof. It passes window 2m high in 0.1 sec. How far is the roof above the top of the window? (takeg=10m/s2)

The loudness or softness of a sound is determined by:

An object is placed in front of a convex mirror at a distance of 60 m from its pole. Object starts moving towards the mirror at 20 ms−1. Find the average speed of the image for a time interval of 2 s if the focal length of the mirror is 20 m.

How are frequency and wavelength related? Give the relation between them.

How Newton's law is applied on animals?

A body of weight 600N rests on the floor of a lift. The cable of the lift breaks and it suddenly starts falling freely. What will be the force exerted by the floor of the lift on this object?

A basketball is launched with an initial speed of 8.5 m/s and follows the trajectory shown. The ball enters the basket 0.87 sec after it is launched. What are the distances x and y?

If the intensities of two sounds are in ratio 9:4, what is the ratio of their amplitudes?

If the body A does a work in 20 s and body B does the same work in 40 s then, what is the ratio of their power respectively?

Magnetic field lines always form:

In Snell’s law, sinisinr = v1v2 = constant This constant is called as:

The three vessels shown in figure have same base area. Equal volumes of a liquid are poured in three vessels. The force on the base will be

A pressure of 10 Pa acts on an area of 3.0m2. What is the force acting on the area? What force will be exerted by the application of the same pressure if the area is made one-third?

A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done : (a) by the force applied by the boy ? (b) by the gravitational force of earth ?

A 4 kg projectile is launched vertically from a height of 2 m with an initial speed of 12 ms−1. Find its speed (to nearest integer) when it is at a height of 3 m above the ground.

In a sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after 2.0 s. If the velocity of waves in sea water is 1450 ms−1​, find the depth of sunken ship.

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

On what factors does the resistance of a conductor depend? [2 MARKS]

What will happen if there are air bubbles are introduced into the barometer tube?

Why we can see some dark area on the surface of moon?

A body is moving in a circular path of radius 0.125 m. If the body covers a distance of one quarter of the circumference of the path in √2 s, what is the velocity of the body in that distance, in m min−1?7.5

What is the value of acceleration due to gravity on the moon?

The value of acceleration due to gravity near the surface of Earth is:

In a sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after 2.0 s. If the velocity of waves in sea water is 1450 ms−1, find the depth of sunken ship.