Download Question 1 - Cambridge Essentials

Year 7 multiple-choice
extension test
7J Electrical circuits
For each question circle the correct answer.
© Cambridge University Press 2003, 2006, 2008
1
7J multiple-choice extension test
Question 1
When the switch is closed this circuit becomes...
A) a complete circuit
B) an incomplete circuit
C) a series circuit
D) a short circuit
© Cambridge University Press 2003, 2006, 2008
2
7J multiple-choice extension test
Question 2
When the switch is closed...
A) both bulbs get dimmer
B) both bulbs go out
C) bulb 1 gets brighter and bulb 2 goes out
D) bulb 1 goes out and bulb 2 gets brighter
© Cambridge University Press 2003, 2006, 2008
3
7J multiple-choice extension test
Question 3
Three 1.5 V cells are connected as shown in the
diagram. The total voltage is...
A) 0.5 V
B) 1.5 V
C) 3.0 V
D) 4.5 V
© Cambridge University Press 2003, 2006, 2008
4
7J multiple-choice extension test
Question 4
The diagram shows three circuits made from
identical cells and bulbs.
The two circuits in which the ammeters give the
same readings are...
A) circuit 1 and circuit 2 only
B) circuit 1 and circuit 3 only
C) circuit 2 and circuit 3 only
D) none of these circuits
© Cambridge University Press 2003, 2006, 2008
5
7J multiple-choice extension test
Question 5
The currents through the ammeters
A1 and A2 are...
A) A1 = 1.0 A; A2 = 2.0 A
B) A1 = 3.0 A; A2 = 1.0 A
C) A1 = 3.0 A; A2 = 2.0 A
D) A1 = 3.0 A; A2 = 3.0 A
© Cambridge University Press 2003, 2006, 2008
6
7J multiple-choice extension test
Question 6
The currents through the ammeters
A1 and A2 are...
A) A1 = 0.5 A; A2 = 0.3 A
B) A1 = 0.5 A; A2 = 0.8 A
C) A1 = 1.0 A; A2 = 1.0 A
D) A1 = 1.5 A; A2 = 0.3 A
© Cambridge University Press 2003, 2006, 2008
7
7J multiple-choice extension test
Question 7
When current passes through a
resistor...
A) the current increases
B) the current decreases
C) the resistance falls
D) the resistor heats up
© Cambridge University Press 2003, 2006, 2008
8
7J multiple-choice extension test
Question 8
This circuit shows two bulbs and a variable
resistor.
When the resistance of the variable resistor is
decreased...
A) both bulbs get brighter
B) both bulbs get dimmer
C) bulb 1 gets brighter and bulb 2 gets dimmer
D) bulb 1 gets dimmer and bulb 2 gets brighter
© Cambridge University Press 2003, 2006, 2008
9
7J multiple-choice extension test
Question 9
A fuse works because...
A) a large current melts a wire to break a circuit
B) a large current melts a wire to complete a
circuit
C) a small current melts a wire to break a
circuit
D) a small current melts a wire to complete a
circuit
© Cambridge University Press 2003, 2006, 2008
10
7J multiple-choice extension test
Question 10
A 13 amp fuse should be fitted
into the plug of...
A) a bedside lamp
B) a computer monitor
C) a kettle
D) a radio
© Cambridge University Press 2003, 2006, 2008
11
7J multiple-choice extension test