pads can be used to set off burglar alarms.
The alarm is set off when someone steps on the pad. The alarm works by sounding a buzzer or switching on a
lamp or both.
are five circuit diagrams.
Look carefully at the five circuit diagrams.
Tick the correct box to show what is happening in each circuit.
the circuit above, both the bulbs light up.
Suddenly they both go out.
The two bulbs are tested. Bulb
A works but bulb B is broken.
Bulb A was not broken but it went out.
Why did it go out?
In the circuit below, only bulb B is broken.
bulb A light up?
Does bulb C light up?
connects up the circuit shown below.
The bulb is not bright enough. His
friend suggests four circuits which could be used to make the bulb brighter.
Which is the correct circuit to use: A, B, C or D?
Next John sets up circuit E and notes the reading on the ammeter.
He then places another bulb in the circuit, to make circuit F.
He notes the ammeter reading in circuit F.
How will the ammeter reading in circuit F compare with that in
The reading in F is
Press the button to check your
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