Electrical Energy Transfers - AQA Physics
Complete the questions below. Once finished, click view your score and see feedback/correct answers
* Required
Energy Transfers - You need to be able to:
• Recall and use the equation Energy = Power x Time
• Recall and use the equation Energy = Charge flow x Potential difference
• Explain how the power of a circuit device is related to the potential difference across it and the current through it, as well as the energy transferred over a given time.
Which Energy equation shows the correct units?
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1 point
Energy (Joules) = Power (W) x Time (hrs)
Energy (Joules) = Power (W) x Time (mins)
Energy (Joules) = Power (Watts) x Time (secs)
Which Energy equation shows the correct units?
*
1 point
Energy (Joules) = Charge flow (Coulombs) x Voltage (Volts)
Energy (Joules) = Charge flow (Amps) x Voltage (Volts)
Energy (Joules) = Charge flow (Newtons) x Voltage (Volts)
Calculate the Energy used by a 40W light bulb in 1 hour.
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0 points
40J
2400J
144,000J
Calculate the Charge flow through a lightbulb if it is connected to Mains electricity and uses 23,000J
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1 point
0.01C
100C
5290C
5,290,000C
Which of the following would increase the energy transferred by an electrical device? Tick all that apply.
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4 points
Increasing the time it is used for
Increasing the charge flow through the device
Increasing the voltage supply to the device
Decreasing the voltage supply to the device
Increasing the resistance in the device
Decreasing the resistance in the device
Required
What does the power rating of an appliance tell you?
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1 point
The rate of transfer of energy by the appliance
The total amount of energy used by the appliance
The total amount of current used by the appliance
The force applied to the appliance
Which equations allow you to calculate power?
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1 point
Power = Energy x Time
Power = Energy / Time
Power = Current x Voltage
Power = Current x Time
Power = Current x Resistance
Required
Calculate the electrical energy supplied to the fan below.
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1 point
25C
300J
600C
18,000J
If an electric heater is supplied with a current of 5A and has a resistance of 100 Ohms, What is the power of the heater?
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1 point
500W
2500W
50,000W
How confident are you with the topic on electrical energy transfers?
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Not confident
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5
Confident
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This form was created inside of Stoke Newington School and Sixth Form.
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