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WorksheetsElectricity power GCSE
Total questions: 11
Worksheet time: 8mins
If a charge flows through a resistor, which of the following happens to the resistor?
It gets colder
It gets hotter
It becomes positively charged
Nothing
In a filament lamp, in what form is most of the energy lost?
Heat
Sound
Kinetic energy
Radio waves
What is power?
The number of repetitions of squats a body-builder can perform
The number of cylinders in a car
The rate at which energy is absorbed
The rate at which energy is transferred
What is the formula for power?
P = E⁄t
P = t⁄E
P = E⁄2t
P = 2E⁄t
Calculate the power of an appliance that uses 1000 joules of energy in 5 seconds.
100 W
200 W
300 W
400 W
Power, potential difference and current are correctly related by which equation?
P = I x V
P = 2I x V
P = I⁄V
P = I⁄2V
What is the voltage of an appliance if it uses 200 J per second when supplied with a current of 5 A?
10 V
20 V
30 V
40 V
Which equation correctly shows the relationship between energy transferred, voltage and charge?
E = V x Q
E = 2V x Q
E = V⁄Q
E = Q⁄V
What is the energy transferred if the voltage is 5 V and the charge is 10 C?
50
25
50 J
25 J
What size of fuse would be required for a 230 V, 500 W heater?
3 A
5 A
13 A
1 A
The graph shows how the current and voltage varies for a filament lamp. The resistance of the lamp varies with voltage. How can you this from the graph?
