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Parallel Circuits MCQ Questions & Answers | Electrical Engineering

Learn Parallel Circuits MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Parallel Circuits MCQ question is the important chapter for a Electrical Engineering and GATE students. Page-3 section-1

21
The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is
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Answer & Solution
Answer: Option B
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22
Three 47 Ω resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately
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Answer & Solution
Answer: Option D
Solution:
First, understand what a parallel circuit means. In a parallel circuit, all the resistors are connected side-by-side to the voltage source. This means the voltage across each resistor is the same, which in this case is 110 volts.

Next, we need to find the total resistance of the parallel combination. Since we have three identical resistors (47 Ω each) in parallel, we can use a simplified formula: Total Resistance (Rtotal) = Resistance of one resistor / Number of resistors.

So, Rtotal = 47 Ω / 3 ≈ 15.67 Ω. The total resistance is less than the resistance of any single resistor when they are in parallel.

Now, we can use Ohm's Law to find the total current drawn from the source. Ohm's Law states: Current (I) = Voltage (V) / Resistance (R).

Therefore, I = 110 V / 15.67 Ω ≈ 7.02 A.

Looking at the options, 7.06 A (Option D) is the closest answer to our calculated value. Therefore, option D is the correct answer.

Therefore, Option D: 7.06 A is the correct answer.
23
If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is
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Answer & Solution
Answer: Option B
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24
A parallel circuit acts as a current divider.
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Answer & Solution
Answer: Option A
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25
The number of current paths equals the number of resistors in parallel.
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Answer & Solution
Answer: Option A
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26
The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is
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Answer & Solution
Answer: Option B
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27
The following resistors are in parallel across a voltage source: 220 Ω, 470 Ω, and 560 Ω. The resistor with the least current is
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Answer & Solution
Answer: Option C
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28
Parallel resistors are connected between the same two points.
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Answer & Solution
Answer: Option A
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29
When an additional resistor is connected across an existing parallel circuit, the total resistance
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Answer & Solution
Answer: Option D
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30
If one of the resistors in a parallel circuit is removed, the total resistance
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Answer & Solution
Answer: Option B
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