# Series-Parallel Circuits

MCQsQuestion.com has 47 Question/Answers about Topic Series-Parallel Circuits

## With 6 V applied, what is the voltage across R2 of a parallel combination of R2 (1 k ), R3 (2 k ), and R4 (1 k ) in series with R1, whose value is 2 k ?

- A. 1 V
- B. 3 V
- C. 5 V
- D. 6 V
- Correct Answer: Option A

## If four 10 k resistors are in series with a single 20 k resistor and one of the parallel resistors shorts, the voltage across the other parallel resistors ________.

- A. increases
- B. decreases
- C. remains the same
- D. drops to zero
- Correct Answer: Option B

## Series components in a series–parallel circuit may be in series with other _______________ components, or with other _______________ components.

- A. individual, combinations of
- B. series, parallel
- C. parallel, series
- D. shunt, parallel
- Correct Answer: Option A

## 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
- Correct Answer: Option B

## 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
- Correct Answer: Option B

## 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
- Correct Answer: Option C

## 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
- Correct Answer: Option A

## The current flowing through an unloaded voltage divider is called the:

- A. resistor current
- B. load current
- C. bleeder current
- D. voltage current
- Correct Answer: Option C

## 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
- Correct Answer: Option D

## What is the total resistance of a circuit when R1 (7 k ) is in series with a parallel combination of R2 (20 k ), R3 (36 k ), and R4 (45 k )?

- A. 4 k
- B. 17 k
- C. 41 k
- D. 108 k
- Correct Answer: Option B

## 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
- Correct Answer: Option C

## 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
- Correct Answer: Option C

## What is the power dissipated by R2, R4, and R6?

- A. P2 = 417 mW, P4 = 193 mW, P6 = 166 mW
- B. P2 = 407 mW, P4 = 183 mW, P6 = 156 mW
- C. P2 = 397 mW, P4 = 173 mW, P6 = 146 mW
- D. P2 = 387 mW, P4 = 163 mW, P6 = 136 mW
- Correct Answer: Option A

## What is the power dissipated by R1, R2, and R3?

- A. P1 = 0.13 W, P2 = 0.26 W, P3 = 0.12 W
- B. P1 = 0.26 W, P2 = 0.52 W, P3 = 0.23 W
- C. P1 = 0.52 W, P2 = 0.92 W, P3 = 0.46 W
- D. P1 = 1.04 W, P2 = 1.84 W, P3 = 0.92 W
- Correct Answer: Option B

## What are the branch currents I2 and I3?

- A. I2 = 4 mA, I3 = 2 mA
- B. I2 = 4.5 mA, I3 = 2.5 mA
- C. I2 = 2.5 mA, I3 = 1.5 mA
- D. I2 = 5.5 mA, I3 = 3.5 mA
- Correct Answer: Option C