Calculating Power - Mrs. Cox Physical Science Class
Calculating Power
P = V x I
P = Power (in watts)
V = Voltage (in volts)
I = Current (in amps or amperes)
1. A 6 volt battery produces a current of 0.5 amps. What is the power in the circuit?
2. A 100 watt light bulb is operating on a 1.2 amperes current. What is the voltage?
3. A potential difference of 120 volts is operating on a 500 watt microwave oven. What is the current being used?
4. A light bulb uses 0.625 amperes from a source of 120 volts. How much power is used by the bulb?
5. What voltage is necessary to run a 500 watt motor with a current of 200 amperes?
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