How much power is produced if a voltage of #4 V# is applied to a circuit with a resistance of #4 Omega#?

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Answer 1 · 2018-03-06T07:21:51

THe power is #=4W#

The voltage is #U=4V#

The resistance is #R=4Omega#

The power is

#P=UI#

and Ohm's Law is

#U=RI#

#I=U/R#

Therefore,

#P=UI=U*U/R=U^2/r=4^2/4=4W#