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9. When a 40V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. Find the value

9. When a 40V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. Find the value of the resistance of the resister: (a) 5000 0 (b) 800 0 (c) 0.8 0 (d) none of these

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