To make an uncharged object to have a negative charge we must...? Mcqs

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To make an uncharged object to have a negative charge we must...?

(A) Remove some portion
(B) Add some atoms

(C) Add some electrons
(D) None of these

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Which among the following is a positively charged particle emitted by a radioactive element...?

(A) Beta rays
(B) Alpha Rays

(C) Gamma rays
(D) Cathode rays

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The velocity of sound in air at sea level is...?

(A) 881 meters per second
(B) 761 meters per second

(C) 661 meters per second
(D) 561 meters per second

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Shape of the Milky Way Galaxy is...?

(A) Rectangular
(B) Spiral

(C) Elliptical
(D) Circular

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Acoustics is the science of

(A) Light
(B) Waves

(C) Sound
(D) Colours

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How many planets are in our solar system...?

(A) 6
(B) 7

(C) 8
(D) 9

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Optical fiber works on the principle of ______...?

(A) Scattering
(B) Total Internal Reflection

(C) Interference
(D) Principle of refraction

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Far Sightedness can be corrected by:...?

(A) Convex lens
(B) Concave lens

(C) Bi Focal lens
(D) None of these

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Phases of the moon occur because...?

(A) only that part of the moon which reflects light
(B) Our distance from the moon keeps changing

(C) The thickness of the moon's atmosphere
(D) The shadow of the Earth covers only a part of moon

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The book “A Brief History of Time” is written by...?

(A) Aristotle
(B) Oswald Spengler

(C) Stephen Hawking
(D) Karl Marx

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