Physics Sec Sample Paper I Worksheet - University Of Malta, 2012 Page 4

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3.
Paul was carrying out an experiment in the school Physics laboratory. He
drew a circuit diagram (Diagram 4) using symbols to represent the
components he used to build his circuit.
A
B
C
D
Diagram 4
E
(a)
In the table below, write down what each of the symbols represents. The first
one has been done for you.
Symbol
Name of component
Cell
• •
(3)
(b)
Paul would like to measure the value of the total current flowing in the circuit
and the potential difference across component C, as shown in Diagram 4
above. Name the two instruments he needs to use.
Instrument to measure current
__________________________
Instrument to measure potential difference __________________________
(2)
In Diagram 4 above, draw the two instruments, showing how they should be
(c)
connected.
(2)
(d)
Cell B has a potential difference of 24 V, components D and E each have a
resistance of 5 Ω and component C has a resistance of 12 Ω. Calculate the
total current flowing in the circuit.
_____________________________________________________________________
_____________________________________________________________________
(3)
Page 4 of 11

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