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Series Circuits MCQs

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1. One of the most common applications of a potentiometer is as an adjustable voltage divider, also known as
A. voltage control
B. current control
C. volume control
D. divider control
Discussion
2. If the resistance total in a series circuit doubles, current will:
A. be the same
B. be doubled
C. reduce source voltage
D. be halved
Discussion
3. Power is defined as:
A. the rate at which work is done
B. work
C. the conversion of energy
D. joules
Discussion
4. With a total resistance of 3300 ohms and a 45 V source, if R3 is 1200 ohms, what will be its voltage drop?
A. 16.36 V
B. 32.72 V
C. 10.90 V
D. 15.00 V
Discussion
5.  An 8-ohm resistor is in series with a lamp. The circuit current is 1 A. With 20 V applied, what voltage is being allowed for the lamp?
A. 4 V
B. 8 V
C. 12 V
D. 20 V
Discussion
6. Kirchhoff’s voltage law states that:
A. the sum of the voltage drops in a series circuit is equal to the total applied voltage
B. the algebraic sum of the resistances is equal to the sum of the voltages
C. the algebraic sum of the individual currents around a closed loop is zero
D. the voltages developed across each element in a series circuit are identical
Discussion
7. If series current doubles, then:
A. resistance is halved
B. voltage is doubled
C. voltage is reduced
D. resistance is doubled
Discussion

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