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?

Parallel Circuits MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Parallel Circuitselectrical-engineering-mcqs › parallel-circuits
Published
19 Dec 2018
Last updated
28 May 2026

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Explanation

Since the bulbs are connected in parallel, each bulb experiences the full voltage of 110 V. Using Ohm's law (I = V / R), the current through each bulb is I = 110 V / 1800 Ω ≈ 0.061 A or 61 mA. However, the correct answer listed is 610 mA, which suggests a different interpretation or a typo in the options. Given the resistance and voltage, the current should be approximately 61 mA.

Practice related questions from the same subject.

  1. 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. 2.What happens to the overall resistance in a parallel circuit when one resistor is taken out?
  3. 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. 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. 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. 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. 7.Three resistors of 220Ω, 470Ω, and 560Ω are connected in parallel to a voltage source. Which resistor carries the smallest current?
  8. 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?

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