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Parallel Circuits MCQ Questions & Answers

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




Question 1

Components that connect in parallel form:

A. branches
B. open circuits
C. short circuits
D. a voltage divider

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Question 2

A parallel circuit differs from a series circuit in that a parallel circuit has

A. no path for current flow
B. fewer paths for current flow
C. one path for current flow
D. more than one path for current flow

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Question 3

If 550 mA of current leaves a node that had 250 mA entering from one branch, how much current would enter from the other?

A. 250 mA
B. 300 mA
C. 550 mA
D. 800 mA

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Question 4

If two parallel-connected resistors dissipate 6 watts and 10 watts of power, then what is the total power loss?

A. 3.75 watts
B. 4 watts
C. 16 watts
D. 60 watts

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Question 5

What happens to total resistance in a circuit with parallel resistors if one of them opens?

A. It increases.
B. It halves.
C. It remains the same.
D. It decreases.

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Question 6

What is the product-over-sum result of 150 and 6800?

A. 150
B. 146.7
C. 0.006
D. 6800

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Question 7

When parallel resistors are of three different values, which has the greatest power loss?

A. The smallest resistance
B. The largest resistance
C. They have the same power loss.
D. Voltage and resistance values are needed.

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Question 8

What are the individual values of two parallel resistors whose RT is 8 ohms, when one has double the resistance of the other?

A. 2.7 ohms and 5.3 ohms
B. 8 ohms and 16 ohms
C. 10 ohms and 20 ohms
D. 12 ohms and 24 ohms

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Question 9

What procedure should be followed when troubleshooting with an ammeter or voltmeter?

A. Short the leads and adjust.
B. Check the meter’s external power supply.
C. Start with the highest scale and adjust down to a lower scale.
D. Start with the lowest scale and adjust up to a higher scale.

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Question 10

Kirchhoff's current law for parallel circuits states that the:

A. sum of all branch voltages equals zero
B. total circuit resistance is less than the smallest branch resistor
C. sum of currents into a junction is equal to the difference of all the branch currents
D. sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction

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Question 11

Which is considered to be the common reference for a parallel circuit?

A. Voltage
B. Current
C. Power
D. Resistance

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Question 12

Which are the better test devices used to isolate a suspected open component within a parallel circuit?

A. a voltmeter or an ohmmeter
B. neither an ammeter nor a voltmeter
C. a wattmeter or a voltmeter
D. an ammeter or an ohmmeter

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Question 13

A parallel circuit is also used as a divider for:

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

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Question 14

In a parallel resistive circuit:

A. there is more than one current path between two points
B. the voltage applied divides between the branches
C. the total branch power exceeds the source power
D. the total circuit conductance is less than the smallest branch conductance

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Question 15

The voltage across any branch of a parallel circuit:

A. varies as the total current varies
B. is inversely proportional to total circuit resistance
C. is equally applied to all branch conductances
D. is dropped in proportion to each branch resistance

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