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1. What is the voltage if the given ampere is 5A and has a resistance of 300?

2. A bulb has a voltage of 220V and current of 20A. What is the resistance of the bulb?

3. An electric fan has a resistance of 50 and a voltage rating of 220V. What is the current needed to operate the electric fan?

4. Find the current I through a resistor of resistance 20 if the voltage across the resistor is 6V.​