13. The filament of a bulb takes a current 100 mA when potential difference across it is 0.2 V. When the potential difference across it becomes 1.0 V, the current becomes 400 mA. Calculate the resistance of the filament in each case and account for the difference
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Step-by-step explanation:
according to oHMS law
v=ir so answer is 2.5 ohm
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