Question

The power used by an electric tool can be determined by multiplying the _____.

resistance times the current
current times the voltage
resistance times the voltage

Answer 1

current time the voltage. Hope this helps:-)

Step-by-step explanation:

Answer 2

Power can be expressed by the product of current and voltage. To see this, consider the units of current and voltage:


`[I]= (C)/(s) \\ \\ {[V]=(J)/(C)} \\ \\ {[V*I]=(C)/(s)(J)/(C)=(J)/(s)=W}`

Where C is coulombs (charge), s is seconds, J is joules (energy), and W is Watts, or power. See that watts are Joules per second, or the time rate of change of energy.