Physics - Questions and Answers, General Study (GK)

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491.

A gas has

(a)Two specific heat

(b)One specific heat

(c)Three specific heat

(d)Infinite no of values of specific heat

Comment

Answer is: D

492.

The pressure exerted on the walls of the container by a gas is due to the fact that the gas molecules

(a)Stick to the walls

(b)Lose their kinetic energy

(c)Change the moment due to collision with the walls

(d)Are accelerated towards the walls

Comment

Answer is: C

493.

The specific heat of a gas at constant pressure is greater than the specific heat at constant volume because

(a)Work is done in the expansion of the gas at constant volume

(b)Work is done in the expansion of the gas at constant pressure

(c)The molecular collision increase at constant pressure

(d)The attraction between the molecules increases at constant pressure

Comment

Answer is: B

494.

Which one of the following would a hydrogen balloon find easiest to lift?
The latent heat of vaporization of a substance is always

(a)Greater than its latent heat of fusion

(b)Greater than its latent heat of sublimation

(c)Equal to its latent heat of sublimation

(d)Less than its latent heat of fusion

Comment

Answer is: A

495.

The field created by heat is a

(a)Vector field

(b)Scalar field

(c)Neither vector nor scalar

(d)Sometime vector or sometime scalar field

Comment

Answer is: B

496.

Consider the following natural phenomena
1. Terrestrial heating
2. Reflection of light
3. Refraction of light
4. Diffraction of light
Due to which of these phenomena is mirage formed?

(a)1 and 2

(b)2, 3 and 4

(d)Only 4

Comment

Answer is: C

497.

Consider the following statements
1. If magenta and yellow coloured circles intersect, the intersected area will have red colour.
2. If cyan and Magenta coloured circles intersect, the intersected area will have blue colour.
Which of statements given above are correct

(a)Only 1

(b)Only 2

(c)Both 1 and 2

(d)Neither 1 nor 2

Comment

Answer is: C

498.

The energy associated with the light depends upon

(a)Its speed

(b)Medium through which it passes

(c)Its frequency

(d)All of above

Comment

Answer is: C

499.

Phenomenon of formation of three dimensional image by entrance of two light beams from laser or other coherent sources of light is called

(a)Optical photography

(b)X rays photography

(c)Radiography

(d)Holography

Comment

Answer is: D

500.

A light wave travelling in a transparent homogeneous medium interd another transparent homogeneous medium of higher refractive index. The speed of light in the second medium

(a)Is less than that in the first medium

(b)It more than that in the first medium

(c)Is this same as that in the first medium

(d)May be more or less than that in the first medium depending on the angle of incidence

Comment

Answer is: A

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Physics - Questions and AnswersPage 50

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