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| Potentiometer wire of length 1m is connected in series with 490Ω resistance and 2 V battery. If 0.2 mV/cm is the potential gradient, then what is the resistance of the potentiometer wire? |
4.9Ω 5.6Ω 3.8Ω 12.4Ω
|
| 4.9Ω |
