9478 + Interview Questions in Physics Page 177 InterviewSolution

8801.	Why the inner planets don't have rings like the outer planets?
Answer» Why the inner planets don't have rings like the outer planets?

Discussion

8802.	Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in
Answer» Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in

Discussion

8803.	A honey bee is vibrating its wings at the rate of 5000 times in 50 s. Calculate the frequency.
Answer» A honey bee is vibrating its wings at the rate of $5000$ times in $50 s$ . Calculate the frequency.

Discussion

8804.	Two forces F1=5 N and F2=8 N acting at points A and B on a rod pivoted at a point O, such that OA = 2 m and OB = 4 m. Calculate the total moment of the two forces about O.
Answer» Two forces $F_{1} = 5 N$ and $F_{2} = 8 N$ acting at points A and B on a rod pivoted at a point O, such that OA = $2 m$ and OB = $4 m$ . Calculate the total moment of the two forces about O.

8804.

Two forces F1=5 N and F2=8 N acting at points A and B on a rod pivoted at a point O, such that OA = 2 m and OB = 4 m. Calculate the total moment of the two forces about O.

Answer»

Two forces $F_{1} = 5 N$ and $F_{2} = 8 N$ acting at points A and B on a rod pivoted at a point O, such that OA = $2 m$ and OB = $4 m$ . Calculate the total moment of the two forces about O.

Discussion

8805.	A ball is rolled along the surface. The ball comes to rest after some time. Which force is responsible for stopping the motion of the ball?
Answer» A ball is rolled along the surface. The ball comes to rest after some time. Which force is responsible for stopping the motion of the ball?

Discussion

8806.	How is a high temperature achieved in a solar cooker by the use of mirrors?
Answer» How is a high temperature achieved in a solar cooker by the use of mirrors?

Discussion

8807.	Why we should not touch the electrical appliances with wet hands? [2 MARKS]
Answer» Why we should not touch the electrical appliances with wet hands? [2 MARKS]

Discussion

8808.	Explain the principle, construction and working of manometer.
Answer» Explain the principle, construction and working of manometer.

Discussion

8809.	What causes planets, asteroids, comets, etc., to revolve around the Sun?
Answer» What causes planets, asteroids, comets, etc., to revolve around the Sun?

Discussion

8810.	The time taken by a sound wave having a frequency of 4 kHz and wavelength of 40 cm to travel 4 km is ___ .
Answer» The time taken by a sound wave having a frequency of 4 kHz and wavelength of 40 cm to travel 4 km is ___ .

Discussion

8811.	Image formed by a plane mirror is
Answer» Image formed by a plane mirror is

Discussion

8812.	What is another name for non-contact force?
Answer» What is another name for non-contact force?

Discussion

8813.	The depth of water in a vessel when seen from air appear to be less because of:
Answer» The depth of water in a vessel when seen from air appear to be less because of:

Discussion

8814.	Can a liquid exert pressure sideways ?
Answer» Can a liquid exert pressure sideways ?

Discussion

8815.	What is a spring balance ?
Answer» What is a spring balance ?

Discussion

8816.	A body when immersed in kerosene sinks. What relation could be established between the density of the body and density of kerosene?
Answer» A body when immersed in kerosene sinks. What relation could be established between the density of the body and density of kerosene?

Discussion

8817.	Observe the following figure. Identify the electrolyte Z in the given figure.
Answer» Observe the following figure. Identify the electrolyte Z in the given figure.

8817.

Observe the following figure. Identify the electrolyte Z in the given figure.

Answer»

Observe the following figure.

Identify the electrolyte Z in the given figure.

Discussion

8818.	Now that we know that the two glass rods become charged when rubbed with a silk cloth, it would be safe to conclude they acquire ___ charges.
Answer» Now that we know that the two glass rods become charged when rubbed with a silk cloth, it would be safe to conclude they acquire ___ charges.

Discussion

8819.	Explain why, wooden (or concrete) sleepers are kept below the railway line.Please provide a diagram with labelling
Answer» Explain why, wooden (or concrete) sleepers are kept below the railway line.Please provide a diagram with labelling

Discussion

8820.	Resistivity of a wire depends upon:
Answer» Resistivity of a wire depends upon:

Discussion

8821.	Question 20 A glass tumbler containing hot water is kept in the freezer compartment of refrigerator (temperature < 0∘C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig.1.2) would correctly represent the change in its temperature as a function of time.
Answer» Question 20 A glass tumbler containing hot water is kept in the freezer compartment of refrigerator (temperature < $0^{\circ}$ C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig.1.2) would correctly represent the change in its temperature as a function of time.

Discussion

8822.	A car is moving towards North. What will be the direction of the force of friction acting on this car due to the surface of the road?
Answer» A car is moving towards North. What will be the direction of the force of friction acting on this car due to the surface of the road?

Discussion

8823.	What do mean by electric current and electrod
Answer» What do mean by electric current and electrod

Discussion

8824.	Person A slides a heavy box on a smooth surface andPerson B has to slide same box on a rough force. Who'll have to apply a larger force and why?
Answer» Person A slides a heavy box on a smooth surface andPerson B has to slide same box on a rough force. Who'll have to apply a larger force and why?

Discussion

8825.	If the moment of force acting on the pivot is 900 dyne-m, calculate the force applied. 600
Answer» If the moment of force acting on the pivot is $900 dyne-m$ , calculate the force applied. 600

8825.

If the moment of force acting on the pivot is 900 dyne-m, calculate the force applied. 600

Answer» If the moment of force acting on the pivot is

900 dyne-m

, calculate the force applied.

600

Discussion

8826.	A vehicle slows down on applying brakes. This happens because of
Answer» A vehicle slows down on applying brakes. This happens because of

Discussion

8827.	A pressure of 2 Nm−2 is applied over a surface area of 4 m2. Calculate the total force acting on the surface.
Answer» A pressure of $2 {Nm}^{- 2}$ is applied over a surface area of $4 m^{2}$ . Calculate the total force acting on the surface.

Discussion

8828.	Three objects A, B, and C having density 1.12 g cm-3, 0.92 g cm-3 and 2.02 g cm-3 respectively, are placed in a water tank. Which object will sink in water tank?
Answer» Three objects A, B, and C having density 1.12 g cm-3, 0.92 g cm-3 and 2.02 g cm-3 respectively, are placed in a water tank. Which object will sink in water tank?

Discussion

8829.	Out of the four basic forces, which is the weakest one?
Answer» Out of the four basic forces, which is the weakest one?

Discussion

8830.	Why is it more difficult to walk properly on a well-polished floor ?
Answer» Why is it more difficult to walk properly on a well-polished floor ?

Discussion

8831.	How is the heat energy supplied to a liquid used during boiling at a fixed temperature?
Answer» How is the heat energy supplied to a liquid used during boiling at a fixed temperature?

Discussion

8832.	The coefficient of apparent expansion of mercury in a glass vessel is 153 × 10−6/∘C and in a steel vessel is 144 × 10−6/∘C. If afor steel is 12 × 10−6/∘C, then that of glass is
Answer» The coefficient of apparent expansion of mercury in a glass vessel is 153 × $10^{- 6} /^{\circ} C$ and in a steel vessel is 144 × $10^{- 6} /^{\circ} C$ . If afor steel is 12 × $10^{- 6} /^{\circ} C$ , then that of glass is

8832.

The coefficient of apparent expansion of mercury in a glass vessel is 153 × 10−6/∘C and in a steel vessel is 144 × 10−6/∘C. If afor steel is 12 × 10−6/∘C, then that of glass is

Answer»

The coefficient of apparent expansion of mercury in a glass vessel is 153 × $10^{- 6} /^{\circ} C$ and in a steel vessel is 144 × $10^{- 6} /^{\circ} C$ . If afor steel is 12 × $10^{- 6} /^{\circ} C$ , then that of glass is

Discussion

8833.	A light ray strikes a mirror normally. What is the angle of reflection?
Answer» A light ray strikes a mirror normally. What is the angle of reflection?

Discussion

8834.	An inverted bell lying at the bottom of a lake 47.6 m deep has 50 cm3 of air trapped in it. The bell is brought to the surface of the lake. The volume of the trapped air will be (atmospheric pressure = 70 cm of Hg and density of Hg = 13.6 g/cm3)
Answer» An inverted bell lying at the bottom of a lake 47.6 m deep has 50 $c m^{3}$ of air trapped in it. The bell is brought to the surface of the lake. The volume of the trapped air will be (atmospheric pressure = 70 cm of Hg and density of Hg = 13.6 $g / c m^{3}$ )

8834.

An inverted bell lying at the bottom of a lake 47.6 m deep has 50 cm3 of air trapped in it. The bell is brought to the surface of the lake. The volume of the trapped air will be (atmospheric pressure = 70 cm of Hg and density of Hg = 13.6 g/cm3)

Answer»

An inverted bell lying at the bottom of a lake 47.6 m deep has 50 $c m^{3}$ of air trapped in it. The bell is brought to the surface of the lake. The volume of the trapped air will be (atmospheric pressure = 70 cm of Hg and density of Hg = 13.6 $g / c m^{3}$ )

Discussion

8835.	A Pendulum oscillates 40 time a second. Find its time Period and frequency?
Answer» A Pendulum oscillates 40 time a second. Find its time Period and frequency?

Discussion

8836.	Three objects A, B, and C are in a liquid, as shown. Arrange them in the correct order of density, from the lowest to the highest.
Answer» Three objects A, B, and C are in a liquid, as shown. Arrange them in the correct order of density, from the lowest to the highest.

Discussion

8837.	What is sliding friction and rolling friction.
Answer» What is sliding friction and rolling friction.

Discussion

8838.	Choose the statements which state laws of reflection correctly. Statement 1: Angle of incidence is greater than the angle of reflection. Statement 2: Angle of incidence is less than the angle of reflection. Statement 3: Angle of incidence is equal to the angle of reflection. Statement 4: The incident ray, the reflected ray and the normal at the point of incidence all lie in the same plane.
Answer» Choose the statements which state laws of reflection correctly. Statement 1: Angle of incidence is greater than the angle of reflection. Statement 2: Angle of incidence is less than the angle of reflection. Statement 3: Angle of incidence is equal to the angle of reflection. Statement 4: The incident ray, the reflected ray and the normal at the point of incidence all lie in the same plane.

8838.

Choose the statements which state laws of reflection correctly. Statement 1: Angle of incidence is greater than the angle of reflection. Statement 2: Angle of incidence is less than the angle of reflection. Statement 3: Angle of incidence is equal to the angle of reflection. Statement 4: The incident ray, the reflected ray and the normal at the point of incidence all lie in the same plane.

Answer»

Choose the statements which state laws of reflection correctly.

Statement 1: Angle of incidence is greater than the angle of reflection.

Statement 2: Angle of incidence is less than the angle of reflection.

Statement 3: Angle of incidence is equal to the angle of reflection.

Statement 4: The incident ray, the reflected ray and the normal at the point of incidence all lie in the same plane.

Discussion

8839.	Which of the following changes occur when you walk out of bright sunshine into a poorly lit room? (a) the pupil becomes larger (b) the lens becomes thicker (c) the ciliary muscle relaxes (d) the pupil becomes smaller
Answer» Which of the following changes occur when you walk out of bright sunshine into a poorly lit room? (a) the pupil becomes larger (b) the lens becomes thicker (c) the ciliary muscle relaxes (d) the pupil becomes smaller

8839.

Which of the following changes occur when you walk out of bright sunshine into a poorly lit room? (a) the pupil becomes larger (b) the lens becomes thicker (c) the ciliary muscle relaxes (d) the pupil becomes smaller

Answer»

Which of the following changes occur when you walk out of bright sunshine into a poorly lit room?

(a) the pupil becomes larger

(b) the lens becomes thicker

(c) the ciliary muscle relaxes

(d) the pupil becomes smaller

Discussion

8840.	A wave transport energy not matter. Justify this statement???
Answer» A wave transport energy not matter. Justify this statement???

Discussion

8841.	Match the following physical quantities with their respective SI units.
Answer» Match the following physical quantities with their respective SI units.

Discussion

8842.	What is importance of pole star
Answer» What is importance of pole star

Discussion

8843.	What is electric discharge?
Answer» What is electric discharge?

Discussion

8844.	Objects or things fall towards the earth when left free. The force causing this free fall is known as
Answer» Objects or things fall towards the earth when left free. The force causing this free fall is known as

Discussion

8845.	The geographical direction in which the magnets align themselves when suspended in air is ___ .
Answer» The geographical direction in which the magnets align themselves when suspended in air is ___ .

Discussion

8846.	Shweta observes lightning in her area. She hears thunder 5 seconds after observing lightning. How far is she from the place where lightning occurred, if the speed of sound is 330 ms -1? How can this be solved? What is the formula?
Answer» Shweta observes lightning in her area. She hears thunder 5 seconds after observing lightning. How far is she from the place where lightning occurred, if the speed of sound is 330 ms -1? How can this be solved? What is the formula?

Discussion

8847.	Identify in which of the following cases friction plays a helpful role.
Answer» Identify in which of the following cases friction plays a helpful role.

Discussion

8848.	A body of mass m is immersed in water with 3/4th of volume outside of water. Buoyant force acting on it is 1000N. Total volume of body is ( Take density of water as 1000kg/m3 and accelaration due to gravity as 10m/s2)
Answer» A body of mass $m$ is immersed in water with $3 / 4 t h$ of volume outside of water. Buoyant force acting on it is $1000 N$ . Total volume of body is ( Take density of water as $1000 k g / m^{3}$ and accelaration due to gravity as $10 m / s^{2}$ )

8848.

A body of mass m is immersed in water with 3/4th of volume outside of water. Buoyant force acting on it is 1000N. Total volume of body is ( Take density of water as 1000kg/m3 and accelaration due to gravity as 10m/s2)

Answer»

A body of mass $m$ is immersed in water with $3 / 4 t h$ of volume outside of water. Buoyant force acting on it is $1000 N$ . Total volume of body is

( Take density of water as $1000 k g / m^{3}$ and accelaration due to gravity as $10 m / s^{2}$ )

Discussion

8849.	What change would you expect in the characteristic of a musical sound if its frequency is increased?
Answer» What change would you expect in the characteristic of a musical sound if its frequency is increased?

8849.

What change would you expect in the characteristic of a musical sound if its frequency is increased?

Answer»

What change would you expect in the characteristic of a musical sound if its frequency is increased?

Discussion

8850.	In human eye, the power of accommodation is controlled by:
Answer» In human eye, the power of accommodation is controlled by:

Discussion

Explore topic-wise InterviewSolutions in .

Why the inner planets don't have rings like the outer planets?

Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in

A honey bee is vibrating its wings at the rate of 5000 times in 50 s. Calculate the frequency.

Two forces F1=5 N and F2=8 N acting at points A and B on a rod pivoted at a point O, such that OA = 2 m and OB = 4 m. Calculate the total moment of the two forces about O.

A ball is rolled along the surface. The ball comes to rest after some time. Which force is responsible for stopping the motion of the ball?

How is a high temperature achieved in a solar cooker by the use of mirrors?

Why we should not touch the electrical appliances with wet hands? [2 MARKS]

Explain the principle, construction and working of manometer.

What causes planets, asteroids, comets, etc., to revolve around the Sun?

The time taken by a sound wave having a frequency of 4 kHz and wavelength of 40 cm to travel 4 km is ___ .

Image formed by a plane mirror is

What is another name for non-contact force?

The depth of water in a vessel when seen from air appear to be less because of:

Can a liquid exert pressure sideways ?

What is a spring balance ?

A body when immersed in kerosene sinks. What relation could be established between the density of the body and density of kerosene?

Observe the following figure. Identify the electrolyte Z in the given figure.

Now that we know that the two glass rods become charged when rubbed with a silk cloth, it would be safe to conclude they acquire ___ charges.

Explain why, wooden (or concrete) sleepers are kept below the railway line.Please provide a diagram with labelling

Resistivity of a wire depends upon:

A car is moving towards North. What will be the direction of the force of friction acting on this car due to the surface of the road?

What do mean by electric current and electrod

Person A slides a heavy box on a smooth surface andPerson B has to slide same box on a rough force. Who'll have to apply a larger force and why?

If the moment of force acting on the pivot is 900 dyne-m, calculate the force applied. 600

A vehicle slows down on applying brakes. This happens because of

A pressure of 2 Nm−2 is applied over a surface area of 4 m2. Calculate the total force acting on the surface.

Three objects A, B, and C having density 1.12 g cm-3, 0.92 g cm-3 and 2.02 g cm-3 respectively, are placed in a water tank. Which object will sink in water tank?

Out of the four basic forces, which is the weakest one?

Why is it more difficult to walk properly on a well-polished floor ?

How is the heat energy supplied to a liquid used during boiling at a fixed temperature?

The coefficient of apparent expansion of mercury in a glass vessel is 153 × 10−6/∘C and in a steel vessel is 144 × 10−6/∘C. If afor steel is 12 × 10−6/∘C, then that of glass is

A light ray strikes a mirror normally. What is the angle of reflection?

An inverted bell lying at the bottom of a lake 47.6 m deep has 50 cm3 of air trapped in it. The bell is brought to the surface of the lake. The volume of the trapped air will be (atmospheric pressure = 70 cm of Hg and density of Hg = 13.6 g/cm3)

A Pendulum oscillates 40 time a second. Find its time Period and frequency?

Three objects A, B, and C are in a liquid, as shown. Arrange them in the correct order of density, from the lowest to the highest.

What is sliding friction and rolling friction.

Which of the following changes occur when you walk out of bright sunshine into a poorly lit room? (a) the pupil becomes larger (b) the lens becomes thicker (c) the ciliary muscle relaxes (d) the pupil becomes smaller

A wave transport energy not matter. Justify this statement???

Match the following physical quantities with their respective SI units.

What is importance of pole star

What is electric discharge?

Objects or things fall towards the earth when left free. The force causing this free fall is known as

The geographical direction in which the magnets align themselves when suspended in air is ___ .

Shweta observes lightning in her area. She hears thunder 5 seconds after observing lightning. How far is she from the place where lightning occurred, if the speed of sound is 330 ms -1? How can this be solved? What is the formula?

Identify in which of the following cases friction plays a helpful role.

A body of mass m is immersed in water with 3/4th of volume outside of water. Buoyant force acting on it is 1000N. Total volume of body is ( Take density of water as 1000kg/m3 and accelaration due to gravity as 10m/s2)

What change would you expect in the characteristic of a musical sound if its frequency is increased?

In human eye, the power of accommodation is controlled by: