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WorksheetsChanging Components in a circuit
Total questions: 12
Worksheet time: 6mins
In this circuit, bulb Y fails. What happens to bulbs X and Z?
will not light up
will keep glowing
In this circuit, bulb S does not light up. What happens to bulbs R and T?
will not light up
will keep glowing
A restaurant uses a portable food warmer to keep food hot. The warmer has two identical bulbs which give out more heat when they are brighter.
Which of the following circuits should be used such that food will be kept the warmest?
Study the circuits below carefully.
Which of the following two bulbs have the same brightness?
A and B
A and D
B and C
A and D
After one of the bulbs in the circuit below had blown, all the other bulbs did not light up.
Which bulb had blown?
A
B
C
D
The diagram shows two circuits with three different bulb colours.
Which circuits A or B will allow a traffic light to turn from green to yellow, then to red?
The diagram below shows an electric circuit.
If bulb P is damaged, how many bulbs will still be lit?
1
2
3
none
A circuit diagram is set up as shown below. Bulb A and B will light in equal brightness when the switch is closed.
What will happen to Bulb A?
It will become brighter than before.
It will become dimmer than before.
It will light up with the same brightness.
The bulb will fuse and it will not light up.
Gia Anh and Kiet wanted to find out whether the position of the bulbs would affect the brightness of the bulbs. They used new batteries, bulbs and wires in their experiment. The length of the wire is the same. They set up the two circuits as shown below.
What would be the possible conclusion for their experiment?
The brightness of the bulbs in X and Y is the same.
The brightness of bulbs in X is dimmer than that in Y.
The brightness of bulbs Y is dimmer than that in X.
The bulbs in X remain unlit but the bulbs in Y lit up.
Look at circuit Y below.
What is the difference you observe in bulb A when bulb B is removed?
Bulb A will shine more brightly.
Bulb A will shine less brightly.
The brightness of Bulb A will remain the same.
Bulb A will not light up.
Look aat the four circuits below.
Which of the following correctly represents the brightness of the bulbs A, B, C and D in each circuit?
(Note: Put in order from the brightest)
A,C,B,D
B,D,A,C
B,A,D,C
C,D,A,B
Trung Quan's torch did not light up when he tried to turn on the torch.
Based on the picture, what is a possible reason why it did not light up?
There is a gap between the batteries
The batteries are connected in parallel.
the metal tip of the bulb is not connected to one end of the batteries.
The positive terminal of one battery is not connected to the negative terminal of the next battery.
