Who discovered gravity? MCQ with Answer and Explanation

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Who discovered gravity?

A. Albert Einstein

B. Galileo

C. Johannes Kepler

D. Isaac Newton

Answer: Option D

Solution (By JKSSB Mock Tests)

Isaac Newton formulated the law of universal gravitation.

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Question #1

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What is the most abundant gas in the Earth's atmosphere?

A. Nitrogen

B. Hydrogen

C. Oxygen

D. Carbon Dioxide

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Correct Answer: Option A

Explanation:
Nitrogen makes up about 78% of Earth's atmosphere.

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Question #2

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What is the unit for electric current?

A. Volt

B. Ohm

C. Ampere

D. Watt

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Correct Answer: Option C

Explanation:
Electric current is measured in Amperes.

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Question #3

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Which element has the atomic number 1?

A. Helium

B. Oxygen

C. Hydrogen

D. Carbon

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Correct Answer: Option C

Explanation:
Hydrogen is the lightest element and sits at the first position in the periodic table.

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