# Series-Parallel Circuits MCQ Questions & Answers

Series-Parallel Circuits MCQs : This section focuses on the "Series-Parallel Circuits". These Multiple Choice Questions (MCQs) should be practiced to improve the Series-Parallel Circuits skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3?

A. 200 mA
B. 800 mA
C. 600 mA
D. 400 mA

Question 2

If a series–parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3?

A. 10 ohms
B. 20 ohms
C. 45 ohms
D. 90 ohms

Question 3

In a series–parallel circuit, individual component power dissipations are calculated using:

A. individual component parameters
B. a percent of the voltage division ratio squared
C. total current squared multiplied by the resistor values
D. a percent of the total power depending on resistor ratios

Question 4

If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?

A. increases
B. decreases
C. remains the same
D. cannot tell

Question 5

If R1 is in series with a parallel combination of R2, R3, and R4, when the resistance value of R2 increases, the voltage across R3 will

A. increase
B. decrease
C. remain the same
D. Cannot tell

Question 6

In a series–parallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2's voltage will:

A. increase
B. decrease
C. remain the same
D. cannot tell

Question 7

What determines if resistor connections are in series, parallel, or series–parallel?

A. the voltage source
B. the power source
C. resistance
D. current flow

Question 8

When a Wheatstone bridge is in a balanced condition, the center voltmeter in the bridge will read:

A. twice the source voltage
B. the same as the source voltage
C. zero volts
D. half the source voltage

Question 9

When placed into a circuit, how are electronic components usually connected?

A. positive terminal to positive terminal
B. in parallel
C. as a combination of series and parallel
D. in series

Question 10

Components or combinations of components with common currents, in a series–parallel circuit, are in:

A. parallel with each other
B. series with each other
C. either series or parallel with each other
D. none of the above

Question 11

When a load is connected to a voltage divider, the total resistance of the circuit will:

A. decrease
B. double
C. increase
D. remain the same

Question 12

The first goal to accomplish in analyzing a complex series-parallel circuit is to

A. equate all parallel components
B. equate all series components
C. solve for all the voltage drops
D. solve for the total current and resistance

Question 13

The first goal(s) to accomplish in analyzing a complex series–parallel circuit is to:

A. equate all parallel components
B. equate all series components
C. solve for all the voltage drops
D. solve for the total current and resistance

Question 14

What theorem replaces a complex network with an equivalent circuit containing a source voltage and a series resistance?

A. Multinetwork
B. Norton
C. Thevenin
D. Superposition

Question 15

If a Wheatstone bridge is balanced, a voltmeter in the center of the bridge will read:

A. the same as the source voltage
B. half the source voltage
C. zero volts
D. twice the source voltage

Question 16

A Wheatstone bridge can be used to determine an unknown

A. current
B. resistance
C. power
D. voltage