What is the power dissipated by a 12 Ohm resistor when 2A of current run through it?
We know P=IV and that V=IR. Therefore as we are only given I and R in the question we can make the substitution for V so that P=I2R.
By plugging in the numbers we get: P=22x 12= 48W
(W=Watts, unit of Power)
OT
Related Physics GCSE answers
All answers ▸A torch uses 15watts of energy. It uses two 1.5volt batteries connected in series. What is the resistance in the circuit of the torch?
Person A, weighing 35 kg, is sitting 10m away from a seesaw pivot. Person B, weighing 50 kg, it sitting at the other end, at a distance d. Calculate d, in order for the seesaw not to topple over. (g=10m/s^2)
Define Newton's three laws
Explain how a convection current forms when a pan of water is being heated over a stove