Do you know the energy transferred equation?
Power and Transferring Electrical Energy Quiz
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Question 1 of 18
1. Question
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?
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Question 2 of 18
2. Question
Electrical currents do work against resistance, causing an energy transfer. How is the energy transferred to the surroundings?
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Question 3 of 18
3. Question
How can we reduce the unwanted energy transfers through wires?
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Question 4 of 18
4. Question
Which of the following are advantages of the heating effect of an electric current? (Current causes heating in wires)
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Question 5 of 18
5. Question
Which of the following is the correct equation for energy transferred?
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Question 6 of 18
6. Question
A 230 V electricity supply gives a current of 2.6 A to a water heater for 25 minutes, calculate the energy transferred.
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J
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Question 7 of 18
7. Question
Which of the following is the correct description of power and correct units?
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Question 8 of 18
8. Question
Which of the following is the correct equation for electrical power?
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Question 9 of 18
9. Question
Calculate the energy transferred when a 550 W heater is used for 5 minutes.
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J
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Question 10 of 18
10. Question
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?
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Question 11 of 18
11. Question
Which of the following is the correct equation describing the relationship between, power, current and potential difference (voltage)?
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Question 12 of 18
12. Question
Which of the following is the correct equation describing the relationship between, power, current and resistance?
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Question 13 of 18
13. Question
Drag and drop to match the description to the type of current
Sort elements
- 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
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Question 14 of 18
14. Question
[question number = 01.2] Use one of the following numbers to fill in the blank:
Batteries, mains power, does, does not
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Complete the sentence: Direct current is supplied by and charge change direction.
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Question 15 of 18
15. Question
Does, does not, sometimes
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Complete the sentence: In A.C. charge change direction.
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Question 16 of 18
16. Question
In A.C. in the UK the cycle happens 50 times per second. What does this tell us?
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Question 17 of 18
17. Question
What is the voltage of the UK domestic mains supply?
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volts
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Question 18 of 18
18. Question
What is the energy transferred from a microwave with an 800 W power rating.
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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)
P=I²×R
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