Multiple Choice. Select the letter of the best answer from among the given choices. 1. Three identical lamps are connected in series to a 12-volt battery. What is the voltage drop across each lamp? A) 2 volts B) 3 volts C) 4 volts D) 5 volts 2. Three 50-Ω resistors are connected in series. The equivalent resistance of the combination is A) 25 Ω. B) 50 Ω. C) 100 Ω D) 150 Ω 3. Two resistors, R1 = 2.00 kΩ and R2 = 3.00 kΩ, are connected in parallel and their combination is connected in series to a fully charged, 150-µF capacitor. When the switch is opened, the capacitor begins to discharged. What is the time constant for the discharge? A) 0.16 s B) 0.17 s C) 0.18 s D) 0.19 s
Multiple Choice. Select the letter of the best answer from among the given choices.
1. Three identical lamps are connected in series to a 12-volt battery. What is the voltage
drop across each lamp?
A) 2 volts B) 3 volts C) 4 volts D) 5 volts
2. Three 50-Ω resistors are connected in series. The equivalent resistance of the
combination is
A) 25 Ω. B) 50 Ω. C) 100 Ω D) 150 Ω
3. Two resistors, R1 = 2.00 kΩ and R2 = 3.00 kΩ, are connected in parallel and their
combination is connected in series to a fully charged, 150-µF capacitor. When the switch is
opened, the capacitor begins to discharged. What is the time constant for the discharge?
A) 0.16 s B) 0.17 s C) 0.18 s D) 0.19 s
4. Four 50-Ω resistors are connected in parallel. The equivalent resistance of the
combination is
A) 50 Ω B) 25 Ω C) 12.5 Ω. D) 6.25 Ω
5. How many 4-Ω resistors must be connected in parallel to have a total resistance of 0.8 Ω?
A) 3 B) 4 C) 5 D) 6
6. Four identical lamps are connected in parallel to a 6-volt battery. What is the voltage drop
across each lamp?
A) 6 volts B) 7 volts C) 8 volts D) 9 volts
7. What happens to the total resistance in a network when more resistors are added to a
series circuit?
A) increases B) decreases C) remains the same
8. Four resistors of resistances 3Ω, 4Ω, 5Ω, and 6Ω are connected in parallel to a 12-volt
source. What is the current through the 5-Ω resistor?
A) 1.2 A B) 1.4 A C) 2.2 A D) 2.4 A
9. In a series circuit with unequal resistances
A) The smallest R has the highest V
B) The largest R has the highest V.
C) The smallest R has the most I.
D) The largest R has the most I.
10. In a parallel circuit, the equivalent resistance is
A) Always greater than any individual resistance.
B) Always less than any individual resistance.
C) Equal to the sum of the individual resistance.
D) Equal to the sum of the reciprocals of their individual resistances.
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