The process of combining two light nuclei to form a heavier nucleus is MCQ with Answer and Explanation

The process of combining two light nuclei to form a heavier nucleus is
A. Fusion
B. Radioactive decay
C. Chain reaction
D. Fission
Answer: Option A
Solution (By JKSSB Mock Tests)
Nuclear fusion: e.g., hydrogen isotopes deuterium and tritium fuse to helium, releasing energy. Powers Sun and stars. Requires high temperature (thermonuclear). Fusion reactor under development.

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Practice More Physics Questions

Question #1
The time of flight of a projectile is maximum when angle of projection is
A. 45°
B. 90°
C. 60°
D. 30°

Correct Answer: Option B


Explanation:
T = 2u sinθ/g, max when sinθ=1 => θ=90° (vertical).

This question belongs to: Science Physics
Question #2
Who among the following scientists first experimentally demonstrated the existence of electromagnetic waves, confirming Maxwell's theoretical predictions?
A. Heinrich Hertz
B. Nikola Tesla
C. Guglielmo Marconi
D. Thomas Edison

Correct Answer: Option A


Explanation:
While James Clerk Maxwell predicted electromagnetic waves mathematically, it was the German physicist Heinrich Hertz who successfully built the first spark-gap transmitter in 1887. He physically generated and detected radio waves in his laboratory, proving Maxwell's theories right. The SI unit of frequency, the Hertz (Hz), is named in his absolute honor.

This question belongs to: Science Physics
Question #3
A ball is projected horizontally from top of a cliff. The time to hit ground depends on
A. Horizontal velocity
B. Both velocity and height
C. Height of cliff and g
D. Mass of ball

Correct Answer: Option C


Explanation:
Vertical motion is independent of horizontal. t = √(2h/g). Mass doesn't affect. Horizontal velocity affects range, not time of fall. Projectile motion independence of perpendicular components.

This question belongs to: Science Physics