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

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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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Who is credited for discovery of Planetry motion___...?

(A) Nicolaus Copernicus
(B) Darwan

(C) Kepler
(D) None

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Decibel is a unit used for:...?

(A) Speed of light
(B) Intensity of sound

(C) Intensity of heat
(D) None of these

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Acoustics is the science of

(A) Light
(B) Waves

(C) Sound
(D) Colours

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The luminous body emits ______...?

(A) Light
(B) Energy

(C) Waves
(D) None of these

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The sun takes ........... years to travel around the galaxy..?

(A) One Hundred Years
(B) One millions years

(C) 225 million years
(D) 225 years

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The lowest zone of atmosphere containing about seventy five percent of total mass of atmosphere and ninety percent of its water vapour is called...?

(A) Troposphere
(B) Lonosphere

(C) Aerosphere
(D) Stratosphere

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Largest planet of the solar system...?

(A) Mercury
(B) Ploto

(C) vinus
(D) Jupiter

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Who discovered the Law of Gravitation...?

(A) Sir Isaac Newton
(B) Louis Pasture

(C) Galileo
(D) Wlliam Henry

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Which is the neutral particle...?

(A) Electron
(B) Proton

(C) Neutron
(D) None of these

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