The power dissipated in a pure inductor in AC circuit is MCQ with Answer and Explanation

The power dissipated in a pure inductor in AC circuit is
A. Zero
B. VI
C. I²R
D. V²/R
Answer: Option A
Solution (By JKSSB Mock Tests)
Phase difference 90°, power factor zero, average power zero.

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Practice More Physics Questions

Question #1
A wire of resistance R is cut into three equal parts. These parts are then connected in parallel. The equivalent resistance is
A. R/9
B. R/3
C. R
D. 3R

Correct Answer: Option A


Explanation:
Each part resistance = R/3. Three such in parallel: 1/R_eq = 3/(R/3) = 9/R => R_eq = R/9. For n equal parts cut and connected parallel, R_eq = R/n².

This question belongs to: Science Physics
Question #2
The part of the refrigerator that absorbs heat from the interior is
A. Condenser coils
B. Evaporator coils
C. Compressor
D. Expansion valve

Correct Answer: Option B


Explanation:
Evaporator (cooling coil) absorbs heat, refrigerant evaporates.

This question belongs to: Science Physics
Question #3
The process of splitting a heavy atomic nucleus into two lighter nuclei of comparable masses is known as:
A. Radioactive decay
B. Nuclear fusion
C. Isotope formation
D. Nuclear fission

Correct Answer: Option D


Explanation:
Nuclear fission is the process where a heavy, unstable nucleus (like Uranium-235) is split into two smaller, stable nuclei when bombarded with a neutron. This process releases a massive amount of energy and more neutrons, triggering a chain reaction. Nuclear fusion is the opposite process (combining light nuclei).

This question belongs to: Science Physics