If a current of #4 A# passing through a circuit generates #42 W# of power, what is the resistance of the circuit?
1 Answer
Apr 24, 2016
Explanation:
Power is current times voltage,
Substituting in the power is
A second equation tells us that voltage is current times resistance, so
Putting in the values of
You could put the two equations together and say that
and simply solve straightaway.