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Electrical Engineering
Series Circuits
Quiz 1
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Q.1
The following resistors (one each) are connected in a series circuit: 470 Ω, 680 Ω, 1 kΩ, and 1.2 kΩ. The voltage source is 20 V. Current through the 680 Ω resistor is approximately
60 mA
30 mA
6 mA
300 mA
Q.2
Two 6 V batteries are connected series aiding across two 1.2 kΩ resistors in series. Current through each resistor is
5 mA
10 mA
0 A
2.5 mA
Q.3
A series circuit has a 24 V source and a total resistance of 120 Ω. The current through each resistor is
24 mA
200 mA
120 mA
20 mA
Q.4
The voltage at one point in a circuit is always measured relative to another point.
True
False
Q.5
A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is
0 V
1.2 V
6 V
0.6 V
Q.6
The total resistance of a circuit is 680 Ω. The percentage of the total voltage appearing across a 47 Ω resistor that makes up part of the total series resistance is
68 %
47 %
69 %
6.91 %
Q.7
The total resistance of eight 5.6 kΩ resistors in series is
8 Ω
5,600 Ω
4,480 Ω
44,800 Ω
Q.8
Two 1.5 V cells are connected series opposing across two 100 Ω resistors in series. Total current flow is
15 mA
5 mA
2 mA
0 A
Q.9
In a series circuit, the individual powers are additive.
True
False
Q.10
The sum of all the voltage drops around a single closed loop in a circuit is zero.
True
False
Q.11
When a fourth resistor is connected in series with three resistors, the total resistance
Increases by one-fourth
Increases
Decreases
Remains the same
Q.12
If a 24 V and a 6 V battery are series opposing, the total voltage is
30 V
24 V
18 V
0 V
Q.13
Which of the following series combinations dissipates the most power when connected across a 120 V source?
One 220 Ω resistor
Two 220 Ω resistors
Three 220 Ω resistors
Four 220 Ω resistors
Q.14
A series circuit acts as a current divider.
True
False
Q.15
When one of three series resistors is removed from a circuit and the circuit is reconnected, the current
Increases
Increases by one-third
Decreases by one-third
Decreases by the amount of current through the removed resistor
Q.16
Three 680 Ω resistors are connected in series with a 470 V source. Current in the circuit is
69 mA
230 mA
23 mA
690 mA
Q.17
The term 'series opposing' means that sources are in series with opposite polarities.
True
False
Q.18
If a 6 V and a 9 V source are connected series aiding, the total voltage is
6 V
9 V
3 V
15 V
Q.19
A series circuit acts as a voltage divider.
True
False
Q.20
A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 Ω. If each resistor is operating in the circuit at its maximum power dissipation, total current flow is
27 mA
2.7 mA
19 mA
190 mA
Q.21
A series circuit consists of three resistors. Two resistors are 1.2 kΩ each. The total resistance is 12 kΩ. The value of the third resistor is
9,600 Ω
960 Ω
1.2 kΩ
Cannot be determined
Q.22
If you know the current anywhere in a series circuit, you know the current everywhere in a series circuit.
True
False
Q.23
Two resistors are in series: a 5.6 kΩ resistor and a 4.7 kΩ resistor. The voltage drop across the 5.6 kΩ resistor is 10 V. The voltage across the 4.7 kΩ resistor is
8.39 V
10 V
2.32 V
0 V
Q.24
The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates
12 W
48 W
3 W
8 W
Q.25
A short in a series circuit prevents current.
True
False
Q.26
To measure the current out of the second resistor in a circuit consisting of four resistors, an ammeter can be placed
Between the second and third resistors
At the negative terminal of the source
Between the third and fourth resistors
At any point in the circuit
Q.27
Five resistors are connected in a series and there is a current of 3 A into the first resistor. The amount of current into the second resistor is
3 A
1 A
4 A
0.3 A
Q.28
The total resistance of a series circuit is equal to the difference between the largest and smallest value resistors.
True
False
Q.29
A series circuit consists of a 4.7 kΩ, a 12 kΩ, and a 2.2 kΩ resistor. The resistor that has the most voltage drop is
The 12 kΩ
The 2.2 kΩ
The 4.7 kΩ
Impossible to determine from the given information
Q.30
There are five resistors in a given series circuit and each resistor has 6 V dropped across it. The source voltage is
6 V
Depends on the current flow
Depends on the resistor values
30 V
0 h : 0 m : 1 s
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