If your stereo uses 192 watts of power, and a current of 1.6A flows through it, what is the voltage of the source?

1 Answer
Morgan
Aug 19, 2017

The voltage is #120"V"#.

Explanation:

Power can be expressed in terms of current and voltage as:

#P=IV#

We can solve for the voltage, V:

#color(darkblue)(V=P/I)#

We are given the following information:

  • #|->P=192"W"#
  • #|->I=1.6"A"#

Substituting this into the equation for voltage:

#V=(192"W")/(1.6"A")#

#=>color(darkblue)(V=120"V")#

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