Discussion in 'Homework Help' started by dlmcknny63, Jan 17, 2009.
a 4 ohm resistor is connected across a 12 volt battery.How much power will the resistor dissipate?
Take a look at this page of the AAC eBook.
P=power in Watts
V=voltage across the resistor in Volts
I=current through the resistor in Amps
R=resistance of the resistor in Ohms
Choose one and make the calculation, the second one suits better in your case because you know the voltage across the resistor and R.