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प्रश्न
A given wire is stretched to double its length. How will its resistance change?
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उत्तर
When a given wire is stretched to double its length, its area of cross-section will be halved, so the resistance of wire will become four times.
संबंधित प्रश्न
The equivalent resistance of the parallel combination of two resistors of 60Ω and 40Ω is _______.
A) 24Ω
(B) 100Ω
(C) 50 Ω
(D) 240Ω
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(b) in parallel,
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