Camping Flashlights

Watt Flashlight
Please please I need help!?

A flashlight uses two 1.5 volt batteries to light a 5 watt bulb. What is the current when the flashlight is on? What is the resistance of the circuit?

Assuming the batteries are in series, that is 3 volts.

P = EI
5 = 3*I
I = 5/3 amp

R = E/I = 3/5/3 = 9/5 ohm

.

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