Electrical Power (P=VI) | GCSE Physics Practice
The power of an electrical component depends on the current flowing through it and the potential difference across it.
Calculate power if V=10V and I=2A.
What is Electrical Power (P=VI) | Practice?
"The rate at which electrical energy is transferred by an electric circuit."
What is the unit of electrical resistance?
Misconception: When a circuit is closed, the 'spent' current returns to the battery.
Calculate the charge flow if a 3A current flows for 10 seconds.
Current is the rate of flow of ____.
Basic Power
Power (W) = Potential Difference (V) x Current (A).
Higher voltage at the same current increases the energy transfer rate.
1 Watt = 1 Joule of energy transferred every second.
Appliance power ratings show how much energy they use from the mains.
Unit Check: If current is in milliamps (mA), divide by 1000 to get Amps before calculating power.
Want to improve faster?
The fastest way to improve your grade is to practise exam-style questions, identify your gaps, and focus only on what you don't know.