Asked by Francisco

A camcorder has a power rating of 16 watts. If the output voltage from its battery is 4 volts, what current does it use?
Answered by Francisco
A 1.5m wire carries a 9 A current when a potential difference of 89 V is applied. What is the resistance of the wire?


The current in a hair dryer measures 10 amps. The resistance of the hair dryer is 8 ohms. What is the voltage?
Answered by Henry
1. P = V*I.
16 = 4*I,
I = ?

3. V = I*R.

Answered by Henry
2. R = V/I = 89/9.

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