The function of a fuse in a domestic circuit is to MCQ with Answer and Explanation

The function of a fuse in a domestic circuit is to
A. Increase power factor
B. Protect against short circuit and overload
C. Reduce current
D. Regulate voltage
Answer: Option B
Solution (By JKExamLibrary)
Fuse is a safety device: thin wire melts when current exceeds safe limit due to short circuit or overload, breaking circuit. Prevents fire and appliance damage. Based on heating effect. MCB is modern alternative.

This question belongs to: Science Physics

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1 Report Error
A geostationary satellite orbits the Earth from:
A. West to East
B. East to West
C. South to North
D. North to South

Correct Answer: Option A


Explanation:
A geostationary satellite must appear stationary to an observer on the Earth's surface. To achieve this, it must orbit in the exact equatorial plane and strictly follow the Earth's rotation. Since the Earth rotates on its axis from West to East, the geostationary satellite must also orbit from West to East.

This question belongs to: Science Physics
Question #2 Report Error
A vibrating tuning fork produces sound waves. These waves are
A. Stationary
B. Transverse
C. Longitudinal
D. Electromagnetic

Correct Answer: Option C


Explanation:
Sound in air is longitudinal.

This question belongs to: Science Physics
Question #3 Report Error
The velocity of sound is maximum in
A. Vacuum
B. Water
C. Air
D. Steel

Correct Answer: Option D


Explanation:
Speed of sound: solids > liquids > gases. In steel ~5000 m/s, water ~1500 m/s, air ~340 m/s. Vacuum no propagation. Speed depends on density and elasticity.

This question belongs to: Science Physics