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Parallel Circuits MCQs

Free 26+ Parallel Circuits MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Practise below with answers and explanations.

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Parallel Circuits — MCQs for Pakistan government job tests

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Parallel Circuits

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1.A total current of 800 mA flows into a set of four resistors connected in parallel. If the currents through three of these resistors are 40 mA, 70 mA, and 200 mA respectively, what is the current passing through the fourth resistor?

2.What happens to the overall resistance in a parallel circuit when one resistor is taken out?

3.In a parallel circuit with three branches, the currents flowing through each branch are 200 mA, 340 mA, and 700 mA respectively, all measured in the same direction. What is the total current entering the junction of these branches?

4.Four resistors are connected in parallel. The current passing through the resistor with resistance R is 15 mA. If the other three resistors have values 2R, 3R, and 4R respectively, what is the total current flowing through the entire circuit?

5.Six resistors are connected in parallel, with the two smallest resistors each having a resistance of 1.2 kΩ. What can be said about the total equivalent resistance?

6.Six resistors are connected in parallel, with the two smallest resistors each having a resistance of 1.2 kΩ. What can be said about the total resistance of the combination?

7.Three resistors of 220Ω, 470Ω, and 560Ω are connected in parallel to a voltage source. Which resistor carries the smallest current?

8.In a parallel circuit with three branches, the currents through R1, R2, and R3 are 12 mA, 15 mA, and 25 mA respectively. If the total current measured is only 27 mA, what can be concluded?

9.Five resistors, each with a resistance of 100 Ω, are connected in parallel. What will be the total resistance if one resistor is taken out of the circuit?

10.In a parallel circuit with a total resistance of 50 Ω and a total current of 120 mA, what is the approximate current flowing through the 270 Ω resistor within the circuit?

11.Three resistors with values 470 Ω, 220 Ω, and 100 Ω are connected in parallel. What is the approximate total resistance of this combination?

12.Four identical resistors are connected in parallel across a 10-volt supply, resulting in a total current of 2 mA from the source. What is the resistance value of each resistor?

13.What is the equivalent resistance when a 1.6 kΩ resistor is connected in parallel with a 120 Ω resistor?

14.An ammeter has an internal resistance of 50 Ω and its meter movement can safely carry a maximum current of 1 mA. To measure a total current of 10 mA without damaging the meter, what is the approximate value of the shunt resistor, RSH1, needed?

15.Four 8-ohm loudspeakers are wired in parallel and connected to an audio amplifier. If the highest voltage supplied to the speakers is 12 V, what is the minimum power output the amplifier must provide to the speakers?

16.What could a sudden rise in the overall current entering a parallel circuit signify?

17.Three resistors, each with a resistance of 47 ohms, are connected in parallel to a 110-volt power supply. What is the approximate total current drawn from the source?

18.In a parallel circuit with five branches, each branch carries a current of 12 mA. If one branch becomes disconnected, what will be the current flowing through each of the remaining four branches?

19.Five 200-watt light bulbs are wired in parallel to a 110 V power supply. What is the approximate current flowing through each bulb?

20.A string of Christmas tree lights is wired in parallel to a 110 V power supply. Each bulb has a filament resistance of 1.8 kΩ. What is the approximate current flowing through each individual bulb?

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