An automobile has a 12-W reading lamp in the ceiling. This lamp operates with a voltage drop of 12 V across it?
Ying Y asked:
An automobile has a 12-W reading lamp in the ceiling. This lamp operates with a voltage drop of 12 V across it. How much current flows through the lamp? Round the answer to 3 significant digits.
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An automobile has a 12-W reading lamp in the ceiling. This lamp operates with a voltage drop of 12 V across it. How much current flows through the lamp? Round the answer to 3 significant digits.
April 24th, 2010 at 4:22 am
wattage = voltage x curent
12 = 12 x I
I = 1 amp
PS, the normal battery voltage is 14 volts when the battery is being charged, which it is when the engine is on.
. billrussell42