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


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

  • Correct Answer
  • It increases. 


  • Parallel Circuits problems


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    • 1. 

      What would these meter readings indicate about the circuit in the given circuit?

      Meter Readings: I = 7.6 mA, V = 12 V


    • Options
    • A. R1 is open.
    • B. R2 is open.
    • C. The fuse is open.
    • D. The circuit is operating normally.
    • Discuss
    • 2. Which component is of the wrong value?


    • Options
    • A. R1
    • B. R2
    • C. R3
    • D. R4
    • Discuss
    • 3. 

      What does I3 equal in the given circuit?


    • Options
    • A. 5 mA
    • B. 45 mA
    • C. 50 mA
    • D. 100 mA
    • Discuss
    • 4. What is the total power of the circuit?


    • Options
    • A. 2.2 W
    • B. 4.2 W
    • C. 6.2 W
    • D. 8.2 W
    • Discuss
    • 5. 

      What would these meter readings indicate about the circuit in the given circuit?

      Meter Readings: I = 10 mA, V = 12 V


    • Options
    • A. R1 is open.
    • B. R2 is open.
    • C. The fuse is open.
    • D. The circuit is operating normally.
    • Discuss
    • 6. What is the product-over-sum result of 150 and 6800?

    • Options
    • A. 150
    • B. 146.7
    • C. 0.006
    • D. 6800
    • Discuss
    • 7. If 550 mA of current leaves a node that had 250 mA entering from one branch, how much current would enter from the other?

    • Options
    • A. 250 mA
    • B. 300 mA
    • C. 550 mA
    • D. 800 mA
    • Discuss
    • 8. What is the total resistance?


    • Options
    • A. 1.045 kΩ
    • B. 1.545 kΩ
    • C. 2.045 kΩ
    • D. 2.545 kΩ
    • Discuss
    • 9. What is the total resistance of four 1 kΩ parallel-connected resistors?

    • Options
    • A. 200 ohms
    • B. 250 ohms
    • C. 400 ohms
    • D. 4 kilohms
    • Discuss
    • 10. What procedure should be followed when troubleshooting with an ammeter or voltmeter?

    • Options
    • 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.
    • Discuss


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