set 15 MCQ Questions & Answers Detailed Explanation

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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq

Questions : Three colours are the primary colours. These are

(a) Yellow, Green and Red

(b) Blue, Green and Red

(c) Blue, Yellow and Red

(d) Blue, Yellow and Red

The correct answers to the above question in:

Answer: (b)

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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers

Question : 1

Retina of the eye is comparable to which of the following parts of a traditional camera?

a) Shutter

b) Lens

c) Film

d) Cover

Answer: (c)

Question : 2

Timbre is called the quality of sound. One can recognise the voice of a familiar human being or instrument without actually seeing them. This quality is associated with

a) overtones present in the sound

b) material of the body

c) shape of the body

d) all of the above

Answer: (d)

Question : 3

At a common temperature, a block of wood and a block of metal feel equally cold or hot. The temperatures of block and wood are

a) greater than temperature of the body

b) equal to the temperature of the body

c) less than the temperature of the body

d) either (b) or (c)

Answer: (b)

The temperatures of the block and wood are equal to the temperature of the body as both feel equally hot or cold.

Question : 4

Blue colour of the sky is due to

a) Interference of light

b) Dispersion of light

c) Scattering of light

d) Emission of more blue light as compared to other colours by the Sun

Answer: (c)

Question : 5

At 0°C a body emits

a) only microwave radiation

b) no radiation

c) only visible light

d) all wavelengths.

Answer: (d)

At any temperature other than zero K, each body emits all wavelengths.

Question : 6

The sun is seen before the actual sunrise because of

a) scattering of light

b) reflection

c) refraction

d) rectilinear propagation of light

Answer: (c)

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