Physics Annual Examinations For Secondary Schools Form 5 - Directorate For Quality And Standards In Education, 2014 Page 8
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1110.
a) Ringo wants to investigate the generation of electricity using magnets. He sets up the
following apparatus.
Galvanometer
i) Label the diagram.
[2]
ii) He then moves the magnet towards the solenoid. He observes that the pointer of the
galvanometer deflects to the left. Explain.
_______________________________________________________________________
_____________________________________________________________________[3]
iii) What happens if he moves the magnet away from the solenoid?
_____________________________________________________________________[2]
iv) Suggest TWO ways how a larger deflection can be obtained.
_______________________________________________________________________
_____________________________________________________________________[2]
b) Linda sets up two solenoids as shown in the
diagram. She managed to do a transformer.
Supply
i) Label the two coils on the diagram. [2]
120 V
~
Iron core
ii) Underline the correct answer: This is a
(step-up, step-down) transformer.
[1]
iii) Why is the core made of iron not steel?
_____________________________________________________________________[2]
N
V
1
1
=
iv) She needs to find the output voltage by using the following formula
. Name the
N
V
2
2
symbols in the formula:
N
= _____________________________
N
= _______________________________
1
2
V
= _____________________________
V
= _______________________________
1
2
[4]
v) Given that N
= 100 turns and N
= 500 turns, calculate V
.
1
2
2
_______________________________________________________________________
_____________________________________________________________________[2]
Physics – Secondary Schools - Track 2 – Form 5 – 2014
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