What is the power flowing thru a circuit containing?

Question

a 12 volt battery and a 4 ohm resistor?  Assume a complete circuit with current flowing thru the resistor

Answer 1

Electrons (electricity).

12V / 4Ω = 3 Amps. 12V x 3A = 36W

Answer 2

Power (P) = V^2 /  R = 12^2 / 4 = 144 / 4 = 36watts

You should also know the current (I) flowing thru the circuit is:

I = P / V = 36 / 12 = 3amps

The proper description is the Power dissipated is 36 watts, and the current flow of the circuit is 3 amps.

Depending on the resistor type, 36watts is relatively high. This usually requires a wire-wound resistor rated at 50watts or higher.

Answer 3

Power = voltage^2  / resistance

P = 12^2 / 4 = 144/4 = 36 Watts.

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Answer 4

electrons???

it carries electrons??