Physics

105 questions in Science & Technology.

Asked in 1995

1995 · Q108 Science & TechnologyPhysicseasy

108. When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in

(a)pitch, loudness and quality
(b)pitch and loudness
(c)quality only
(d)loudness only

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Official answer(c) quality only

1995 · Q109 Science & TechnologyPhysicsmoderate

109. Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape. Reason (R): The refractive index of diamond is less than that of glass. In the context of the above two statements, which one of the following is correct?

(a)Both A and R are true, and R is the correct explanation of A
(b)Both A and R are true, but R is not a correct explanation of A
(c)A is true, but R is false
(d)A is false, but R is true

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Official answer(c) A is true, but R is false

1995 · Q111 Science & TechnologyPhysicseasy

111. Optical fibre works on the principle of

(a)total internal reflection
(b)refraction
(c)scattering
(d)interference

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Official answer(a) total internal reflection

1995 · Q112 Science & TechnologyPhysicsdifficult

112. Suppose a rocketship is receding from the earth at a speed of 2⁄10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?

(a)Blue
(b)Orange
(c)Yellow
(d)Yellow-orange

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Official answer(d) Yellow-orange

1995 · Q115 Science & TechnologyPhysicsmoderate

An air bubble in water will act like a

(a)convex mirror
(b)convex lens
(c)concave mirror
(d)concave lens

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Official answer(d) concave lens