YEAR 12 PHYSICS
Unit 3: Motion in one and two Dimensions
Homeroom:……………
Electronics Revision Worksheet # 1
Due Date:………………………
Question 1
A circuit consists of three identical lamps
connected to a battery with a switch as shown in
the diagram. When the switch is closed what
happens:
a)
Name:……………………………..
e)
to the potential difference across lamp C?
f)
to the total power dissipated in the circuit?
to the intensity of lamp A?
Question 2
In the following three circuits the batteries and
resistors are all identical.
b)
to the intensity of lamp C?
a) Which resistor(s) has the highest current flowing
through it?
c)
to the current in the circuit?
b) Which resistor(s) has the lowest current flowing
through it?
d)
to the potential difference across lamp
B?
Year 12 Physics
Unit 3 – Electronics Revision
WS #1
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c) Which resistor(s) has the highest power
dissipated through it?
Question 3
a) For the following circuits, which of the following
statements is correct? Assume the ammeters are
identical.
A) Ammeter X displays the highest current.
B) Ammeter Y displays the highest current.
C) Both ammeters display the same current.
b) For the following circuits, which of the following
statements is correct? Assume the voltmeters are
identical.
A) Voltmeter X displays the higher voltage drop.
B) Voltmeter Y displays the higher voltage drop.
C) Both voltmeters display the same voltage.
Year 12 Physics
Unit 3 – Electronics Revision
WS #1
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Question 4
A voltmeter is used to measure the voltage (relative to
ground] at various points around a circuit. The
voltages at points X and Y are as shown in the
diagrams.
For circuits (a) and (b) determine the magnitude and
direction (P or Q) for the current flowing through the 5
k resistor and the 2 k resistor.
Question 5
The following circuit is a simple voltage divider
consisting of two variable resistors of resistance
R1 and R2. Complete the table.
R1
1000
1000
400
900
2.0
Year 12 Physics
Unit 3 – Electronics Revision
WS #1
R2
Vout
10
Question 6
Three variable resistors R1, R2 and R3 are connected
to a switch S. Determine the values of Vout in the
table.
R1
200
300
50
100
200
5.0
100
2.0
3.0
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R2
200
100
50
100
100
R3
100
25
75
1000
100
S
Open
Open
Open
Open
Closed
Vout
Question 7
The graph (below) represents a plot of potential
difference (V) as a function of position (clockwise
from X) around the electronic circuit (below).
Assume all wires and the switch have zero
resistance.
Sketch the potential difference versus position
graphs for the following circuits.
Year 12 Physics
Unit 3 – Electronics Revision
WS #1
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The following information applies to questions 810.
A manufacturer makes two different globes for a
12.0 V torch:
one is rated at 0.50 W and the other at 1.00 W.
Question 10
If the two globes are connected in series across the
12.0V supply:
a which has the greater potential difference across it?
Question 8
What is the resistance of each globe when it is
operating correctly?
b which has the greater current through it?
c which glows more brightly?
Question 9
If the two globes are connected in parallel across
a 12.0V supply:
a which has the greater potential difference
across it? b which has the greater current through
it? c which glows more brightly?
Question 11*
Consider the circuit shown.
a Determine the total resistance connected across the
battery terminals.
b Determine the voltage across the 40 k resistor.
c Determine the current through the 5 k resistor.
d Determine the voltage across the 20 k resistor.
Year 12 Physics
Unit 3 – Electronics Revision
WS #1
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