Physics · Electricity
एक बेलनाकार धातु के तार को इस तरह पुनर्गठित किया जाता है कि उसके आयतन में बिना किसी परिवर्तन के उसकी लंबाई 30% कम हो जाती है। इसके विद्युत प्रतिरोध में कितने प्रतिशत की कमी आएगी?
- 169%
- 230%
- 341%
- 451%✓
सही उत्तर देखें
51%
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