Series Parallel Circuits MCQ Questions & Answers

1

The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is

A) 20,000 Ω B) 100,000 Ω C) 200,000 Ω D) 1,000,000 Ω

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Answer & Solution

Answer: Option B

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2

A 6 V battery output is divided down to obtain two output voltages. Three 2.2 kΩ resistors are used to provide the two taps. The two output voltages are

A) 2 V, 4 V B) 2 V, 2 V C) 2 V, 6 V D) 4 V, 6 V

Discuss

Answer & Solution

Answer: Option A

Solution:

Imagine the three 2.2 kΩ resistors connected one after another, forming a series circuit.
The 6V battery is connected across this entire series.
The voltage drops across resistors in a series are proportional to their resistance. Since all resistors have the same resistance, the voltage will be divided equally.

Calculating the voltage drop across each resistor:
Since there are three equal resistors, the 6V will be divided into three equal parts.
6V / 3 = 2V per resistor.

Finding the output voltages:
The first tap is after the first resistor. Thus, the voltage at the first tap with respect to ground is the voltage drop across that resistor, which is 2V.
The second tap is after the second resistor. Therefore, the voltage at the second tap with respect to ground is the sum of the voltage drops across the first two resistors. That means 2V + 2V = 4V.

Therefore, the two output voltages are 2V and 4V.
The Correct Answer is Option A: 2 V, 4 V.

3

A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?

A) 1 MΩ B) 100 kΩ C) 1 kΩ D) 330 Ω

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Answer & Solution

Answer: Option A

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4

A certain voltage divider consists of two 12 kΩ resistors in series. Which of the following load resistors will have the most effect on the output voltage?

A) 1 MΩ B) 24 kΩ C) 18 kΩ D) 12 kΩ

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Answer & Solution

Answer: Option D

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5

Two 1.2 kΩ resistors are in series and this series combination is in parallel with a 3.3 kΩ resistor. The total resistance is

A) 138 Ω B) 1,389 Ω C) 5,700 Ω D) 880 Ω

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Answer & Solution

Answer: Option B

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6

The parallel combination of a 470 Ω resistor and a 680 Ω resistor is in series with the parallel combination of four 2 kΩ resistors. The total resistance is

A) 1,650 Ω B) 1,078 Ω C) 77.8 Ω D) 778 Ω

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Answer & Solution

Answer: Option D

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7

To derive 18 V and 12 V from a 24 V supply requires a voltage divider with three taps.

A) True B) False

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Answer & Solution

Answer: Option A

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8

Two 3.3 kΩ resistors are in series and this series combination is in parallel with a 4.7 kΩ resistor. The voltage across one of the 3.3 kΩ resistors is 12 V. The voltage across the 4.7 kΩ resistor is

A) 24 V B) 12 V C) 0 V D) 6 V

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Answer & Solution

Answer: Option A

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9

A voltage divider consists of two 100 kΩ resistors and a 12 V source. What will the output voltage be if a load resistor of 1 MΩ is connected to the output?

A) 0.57 V B) 6 V C) 12 V D) 5.7 V

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Answer & Solution

Answer: Option D

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10

A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 kΩ. The other resistor value is

A) 1,403 Ω B) 4.7 kΩ C) 2 kΩ D) 3,403 Ω

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Answer & Solution

Answer: Option B

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Series Parallel Circuits MCQ Questions &amp; Answers | Electrical Engineering

Series Parallel Circuits MCQ Questions & Answers | Electrical Engineering