Who among the following discovered the sunspots...? Mcqs

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Who among the following discovered the sunspots...?

(A) Johannes Kepler
(B) Einstein

(C) Copernicus
(D) Galileo

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A photostat machine works on _____________...?

(A) electromagnetic image making
(B) magnetic image making

(C) thermal image making
(D) electrostatic image making

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T.V. transmission cannot cover a very large area because...?

(A) the strength of T.V. waves is very limited
(B) picture cannot be transmitted clearly after a specific distance

(C) the shape of the earth is spherical
(D) the air is not a good conductor of light and sound/waves

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The type of radiation that travels in a straight line across an electric field is a/an...?

(A) Proton
(B) Electron

(C) α-particle
(D) γ-particle

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Only male frog produce croacking sound because _________ ...?

(A) Male frog can magnify their voice with the help of sound box.
(B) Male frog have three pair of vocal cord

(C) Female frog have larynx but no vocal cord
(D) Female frog have no larynx

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The audible range of normal human ear is ____...?

(A) 16 Hz to 20kHz
(B) 10 Hz to 31kHz

(C) 67 Hz to 45kHz
(D) 20 Hz to 20kHz

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___________ is a strong smelling agent added to LPG cylinders to detect leakage...?

(A) Nitrogen Peroxide
(B) Ethyl Mercaptan

(C) Carbon Monoxide
(D) Sulphur Dioxide

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How much percentage (%) of the Earth's Surface is covered with water...?

(A) 70%
(B) 60%

(C) 90%
(D) 75%

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The distance of longitude represents how many minutes difference in time...?

(A) 10 minutes
(B) 4 minutes

(C) 15 minutes
(D) 1 minute

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The earth revolves around the sun at a speed of__________...?

(A) 18.5 km/sec
(B) 26.6 km/sec

(C) 29 km/sec
(D) 31.9 km/sec

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