How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

توضیح

Convert 7.0 milliamperes to 0.0070 amperes first, then P = I² × R = 0.0070² × 1250 = 0.06125 watts, which is about 61 milliwatts. Leaving the current in milliamperes is what produces the answers stated in whole watts.