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1. A voltmeter connected across the ends of a stove heating element indicates a potential difference of 120 v when an ammeter shows a current through the coil of 6.0 a. what is the resistance of the coil?
2. A 100 Ω of wire resistor has it's length doubled. What is it's new resistance?
3. A 500 Ω wire resistor is compared to the resistance of the same material but half it's radius. What is the resistance of this wire?
4. A tv remote control has a resistance of 9.0 Ω and is connected to two AA batteries with a potential difference of 3.0 V. What is the current through the remote control?
5. What is the potential difference across a computer power supply with a resistance of 50 Ω if the motor draws a current of 2.