Question:
The resistance of a coil for d.c. is \(5\Omega\). In a.c., the resistance will
The resistance of a coil for d.c. is \(5\Omega\). In a.c., the resistance will
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AC effect:
Skin effect $\rightarrow$ increases resistance
Updated On: May 8, 2026
- remain same.
- increase.
- decrease.
- be zero.
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The Correct Option is B
Solution and Explanation
Concept: In AC circuits, effective resistance increases due to:
• Skin effect (current flows near surface)
• Inductive reactance
Step 1: Compare DC vs AC.
• DC: Uniform current distribution
• AC: Non-uniform distribution + reactance
Step 2: Conclusion.
Thus, resistance in AC is higher than DC. Final Answer: Option (B)
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