The SI standard of time is based on_____________...? Mcqs

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The SI standard of time is based on_____________...?

(A) the daily rotation of the earth
(B) the frequency of light emitted by Kr86

(C) the yearly revolution of the earth about the sun
(D) a precision pendulum clock

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The chief constituents of gobar gas is_________...?

(A) Methane
(B) Oxygen

(C) Hydrogen
(D) Carbon monoxide

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Which bird weighs less than a penny...?

(A) Goldcrest
(B) Weebill

(C) Hummingbird
(D) None of these

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The splitting of white light into its component colours is called ____...?

(A) Refraction of light
(B) Reflection of light

(C) Dispersion of light
(D) Diffraction of light

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A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls _________...?

(A) behind him
(B) in front of him

(C) into his hand
(D) by his side

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First Atomic theory was proposed by...?

(A) John Dalton
(B) E.Rutherford

(C) De Broglie
(D) D.I.Mendeleef

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Hailey’s comet is visible after every_________...?

(A) 84 years
(B) 76 years

(C) 1000 years
(D) 365 years

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Oil rises in a wick of oil lamp on account of a property of matter is called...?

(A) Angle of projection
(B) Determines

(C) Capillary action
(D) Refraction of light

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Select the odd one of the following...?

(A) Theory
(B) Law

(C) Hypothesis
(D) Ratio

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A fathom is equal to ________feets...?

(A) 6
(B) 5

(C) 4
(D) 3

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