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Electric circuits revision
By Sandra Kuhn
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Last updated about 1 year ago
22 questions
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Question 1
1.
What is the unit of electric current?
Watt
Ohm
Ampere
Volt
Question 2
2.
What is the property of a material that opposes the flow of electric current called?
Resistance
Voltage
Power
Current
Question 3
3.
The diagrams show four circuits.
Which circuit contains two bulbs connected in parallel with each other, and contains an ammeter that measures the total current in the two bulbs?
A
B
C
D
Question 4
4.
What happens to the resistance when more resistors are added in parallel?
Stays the Same
Increases
Does Not Affect
Decreases
Question 5
5.
What happens to the total resistance of a circuit if resistors are connected in a series?
Decreases
Stays the same
Goes to zero
Increases
Question 6
6.
What happens to the total resistance in a parallel circuit when a new resistor is added?
It remains the same
It increases
It depends on the value of the new resistor
It decreases
Question 7
7.
What is the potential difference across a 4 ohm resistor with a current of 0,5 A?
2,5 V
2 V
8 V
0,125 V
Question 8
8.
What is the total resistance in this circuit?
10 Ω
5 Ω
25 Ω
6 Ω
Question 9
9.
Which of the following describes emf?
The flow of electric charge through a circuit
The voltage produced by a source of electrical energy
The resistance of an electrical circuit
The ability of a material to conduct electricity
Question 10
10.
12 V
1,5 V
15 V
9 V
8 V
Question 11
11.
What are resistors in series best described as?
Parallel voltage sources
Voltage dividers
Short circuits
Current amplifiers
Question 12
12.
When resistors are connected in parallel, they act as:
voltage multipliers
current dividers
energy converters
frequency regulators
Question 13
13.
What is the property of an ohmic conductor?
Varied resistance
Constant resistance
Good insulation
Superconductivity
Question 14
14.
What unit is used to measure work done by electricity?
Watt
Ampere
Joule
Volt
Question 15
15.
What is the voltmeter reading over the 12 Ω resistor?
4 V
6,25 V
0,16 V
1,92 V
0,33 V
Question 16
16.
What is the effective resistance of the two resistors in parallel?
3,53 Ω
0,28 Ω
7 Ω
17 Ω
Question 17
17.
What is the current in the 12 Ω resistor?
0,80 A
1,0 A
0,33 A
1,92 A
Question 18
18.
In the following circuit, the reading on the voltmeter is 24 V.
The current in the circuit is ______ amperes and the emf of the battery is _______ volts.
Other Answer Choices:
drag_indicator
2
drag_indicator
0,5
drag_indicator
24
Question 19
19.
A student investigates how the current in resistor R varies with the voltage across it.
Which circuit does the student use?
A
B
C
D
Question 20
20.
What is the resistance of the light bulb?
36 Ω
0,1 Ω
10 Ω
3,6 Ω
Question 21
21.
Which statement is correct?
The total resistance of the parallel circuit is 6,0 Ω
The total resistance of the series circuit is 3,0 Ω
In the parallel circuit, the reading on ammeter P is less than the reading on either of the other two ammeters
In the series circuit, the readings on the ammeters are the same
Question 22
22.
Which symbol represents a fuse?
A
B
C
D