How much power is produced if a voltage of $7 V$ $7 V$ is applied to a circuit with a resistance of $21 Omega$ ?

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Answer 1 · 2016-05-19T23:31:14

Power= current squared x resistance. or voltage x current.

Here current =- 7/21=0.333 AMPERS.
so power= voltage x current= 7 x 0.333=2.333 watts.

How much power is produced if a voltage of 7 V7V7 V is applied to a circuit with a resistance of 21 Omega21 Omega?