Newton's First Law of Motion is also known as the Law of: MCQ with Answer and Explanation

Newton's First Law of Motion is also known as the Law of:
A. Gravitation
B. Action and Reaction
C. Momentum
D. Inertia
Answer: Option D
Solution (By JKSSB Mock Tests)
Newton's First Law states that a body at rest stays at rest, and a body in motion stays in uniform motion unless acted upon by an external unbalanced force. This inherent property of matter to resist any change in its state of rest or motion is called inertia, hence it is known as the Law of Inertia.

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Practice More Physics Questions

Question #1
The boiling point of water in Kelvin is
A. 100 K
B. 273 K
C. 373 K
D. 212 K

Correct Answer: Option C


Explanation:
100°C = 373.15 K, approximately 373 K. Freezing 273 K. No degree sign for Kelvin. Kelvin scale starts at absolute zero.

This question belongs to: Science Physics
Question #2
The term 'latent heat' was introduced by
A. Kelvin
B. Calorie
C. Joule
D. Black

Correct Answer: Option D


Explanation:
Joseph Black introduced concept of latent heat and specific heat.

This question belongs to: Science Physics
Question #3
LED works on the principle of
A. Thermionic emission
B. Field emission
C. Electroluminescence
D. Photoelectric effect

Correct Answer: Option C


Explanation:
Recombination of electrons and holes emits light in forward-biased p-n junction.

This question belongs to: Science Physics