Do you know the energy transferred equation?
Power and Transferring Electrical Energy Quiz
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When there is an electric current in a resistor, there is an energy transfer which heats the resistor. Which of the following explains why there is an energy transfer?CorrectIncorrect
Electrical currents do work against resistance, causing an energy transfer. How is the energy transferred to the surroundings?CorrectIncorrect
How can we reduce the unwanted energy transfers through wires?CorrectIncorrect
Which of the following are advantages of the heating effect of an electric current? (Current causes heating in wires)CorrectIncorrect
Which of the following is the correct equation for energy transferred?CorrectIncorrect
A 230 V electricity supply gives a current of 2.6 A to a water heater for 25 minutes, calculate the energy transferred. (Add the units to your answer)
Which of the following is the correct description of power and correct units?CorrectIncorrect
Which of the following is the correct equation for electrical power?CorrectIncorrect
Calculate the energy transferred when a 550 W heater is used for 5 minutes.
The power transfer in an electrical device is related to the potential difference across it and the current through it. Which is the correct description of this relationship?CorrectIncorrect
Which of the following is the correct equation describing the relationship between, power, current and potential difference (voltage)?CorrectIncorrect
Which of the following is the correct equation describing the relationship between, power, current and resistance?CorrectIncorrect
Drag and drop to match the description to the type of current
- Alternating current (A.C)
- Direct current (D.C)
- Voltage alternates from peak in one direction to peak in another direction.
- Voltage does not alternate between directions
Batteries, mains power, does, does not
Correct 2 / 2 PointsIncorrect / 2 Points
Complete the sentence: Direct current is supplied by and charge change direction.
Does, does not, sometimes
Complete the sentence: In A.C. charge change direction.
In A.C. in the UK the cycle happens 50 times per second. What does this tell us?CorrectIncorrect
What is the voltage of the UK domestic mains supply? Include the units in your answerCorrectIncorrect
What is the energy transferred from a microwave with an 800 W power rating.CorrectIncorrect
All GCSE Electricity equations, with digital calculators, are available here: GCSE Electricity Equations and Calculators.
Essential equations for this quiz -
energy transferred (joule, J) = current (ampere, A) × potential difference (volt, V) × time (second, s)
E = I × V × t
power (watt, W) = energy transferred (joule, J) ÷ time taken (second, s)
P = E / t
electrical power (watt, W) = current (ampere, A) × potential difference (volt, V)
P = I ×V
electrical power (watt, W) = current squared (ampere², A²) ×
resistance (ohm, Ω)