Grade 9 Current, Voltage and Resistance Quiz

Quiz by Julia Malcolm

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12 questions
• Q1
What is the unit for Q- Charge?
Amperes (A)
Coloumbs (C)
Voltage (V)
Ohms
60s
• Q2
What is the name of the device that measures current?
voltmer
ammeter
electrometer
ohmmeter
300s
• Q3
Complete the following sentence: When using an ammeter, it should be placed in series to measure the current through a component. A voltmeter should be placed in ______ to measure the potential difference across a component.
series
line
parallel
60s
• Q4
In the circuit diagram, where should another switch be placed so that both lamps can be turned on or off independently?
A
D
B
C
60s
• Q5
At which point in the circuit – A, B, C or D – should an ammeter be placed to measure the total current flowing through this circuit?
D
A
B
C
60s
• Q6
In the same circuit diagram, where should a switch be placed that would turn off both lamps at the same time?
C
A
B
D
60s
• Q7
Is the following circuit, a series or parallel circuit?
series
parallel
60s
• Q8
Which sentence below best describes the energy transfer in a battery (cell)?
Chemical to electrical.
Kinetic to electrical.
Chemical to heat.
Electrical to kinetic.
60s
• Q9
Calculate the amount of current through an electric toaster if it takes 900 C of charge to toast two slices of bread in 1.5 min.
30C
10C
10A
30A
120s
• Q10
What is the resistance of a lamp that draws 15A from a 240V circuit
0.06 Ohms
16 Ohms
3600 Ohms
120s
• Q11
If it takes a current of 10A for 300 s to boil a kettle of water requiring 360,000 J of energy. What is the potential difference across the kettle?
3000C
120V
1200V
12000V
300s
• Q12
Calculate the current that flows through a hair dryer that uses 18000J of energy when it is plugged into a 120V outlet for 15 seconds.
100A
0.1A
10A
150C
300s

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