Newton's contribution to physics: MCQ with Answer and Explanation

Newton's contribution to physics:

A. Quantum mechanics

B. Theory of relativity

C. Electromagnetic theory

D. Laws of motion and gravitation

Answer: Option D

Solution (By JKExamLibrary)

Isaac Newton: three laws of motion, universal gravitation, calculus, optics. Relativity: Einstein; EM theory: Maxwell; Quantum: Planck/Bohr. Memory tip: 'Newton = classical mechanics foundation'. Scientist-discovery association frequently tested in competitive exams.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

Which combination of logic gates is universally known as a 'Universal Gate' because it can be used to construct any other basic logic gate (AND, OR, NOT)?

A. NOT and AND

B. NAND and NOR

C. XOR and XNOR

D. AND and OR

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Correct Answer: Option B

Explanation:
NAND (NOT-AND) and NOR (NOT-OR) gates are called Universal Gates in digital electronics. By cleverly combining multiple NAND gates (or multiple NOR gates) together, one can perfectly replicate the logical function of any basic gate (NOT, AND, OR) without needing the actual basic gates themselves.

This question belongs to: Science Physics

Question #2 Report Error

A ball is thrown upward with velocity 30 m/s. Time to reach maximum height (g=10) is

A. 3 s

B. 2 s

C. 6 s

D. 1.5 s

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Correct Answer: Option A

Explanation:
v = u - gt, at top v=0 => t = u/g = 30/10 = 3 s.

This question belongs to: Science Physics

Question #3 Report Error

An electric bulb rated 220 V, 100 W is operated at 110 V. The power consumed is

A. 12.5 W

B. 100 W

C. 25 W

D. 50 W

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Correct Answer: Option C

Explanation:
Resistance R = V²/P = 220²/100 = 484 Ω. At 110 V, P = V²/R = 110²/484 = 12100/484 = 25 W. Assuming resistance constant. Power reduces to quarter when voltage halved (P ∝ V² for fixed R).

This question belongs to: Science Physics

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