logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electrical Engineering ‣ Parallel Circuits Comments
  • Question

  • Five 100 Ω resistors are connected in parallel. If one resistor is removed, the total resistance is


  • Options
  • A. 25 Ω
  • B. 500 Ω
  • C. 100 Ω
  • D. 20 Ω

  • Correct Answer
  • 25 Ω 

    Explanation 
    1/R = 1/R1 + 1/R2 + 1/R3 + 1/R4

1/R = 1/100 + 1/100 + 100 + 1/100

1/R = 4/100

1/R = 1/25

Therefore R = 25 ohm.

    • Parallel Circuits problems

    Search Results

    • 1. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately

    • Options
    • A. 790 Ω
    • B. 470 Ω
    • C. 60 Ω
    • D. 30 Ω
      • Discuss
    • 2. How much continuous current can be drawn from a 60 Ah battery for 14 h?

    • Options
    • A. 42.8 A
    • B. 428 A
    • C. 4.28 A
    • D. 4.2 A
      • Discuss
    • 3. A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume?

    • Options
    • A. 20.16 kWh
    • B. 201.6 kWh
    • C. 2.01 kWh
    • D. 8.4 kWh
      • Discuss
    • 4. A 6 V battery is connected to a 300 Ω load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?

    • Options
    • A. 1 h
    • B. 200 h
    • C. 2,000 h
    • D. 10 h
      • Discuss
    • 5. A half-watt is equal to how many milliwatts?

    • Options
    • A. 5,000 mW
    • B. 5 mW
    • C. 500 mW
    • D. 50 mW
      • Discuss
    • 6. Three lights are connected in parallel across a 120 volt source. If one light burns out,

    • Options
    • A. the remaining two will glow dimmer
    • B. the remaining two will glow brighter
    • C. the remaining two will not light
    • D. the remaining two will glow with the same brightness as before
      • Discuss
    • 7. In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is

    • Options
    • A. 48 mA
    • B. 12 mA
    • C. 0 A
    • D. 3 mA
      • Discuss
    • 8. When an additional resistor is connected across an existing parallel circuit, the total resistance

    • Options
    • A. remains the same
    • B. decreases by the value of the added resistor
    • C. increases by the value of the added resistor
    • D. decreases
      • Discuss
    • 9. Three 47 Ω resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately

    • Options
    • A. 2.3 A
    • B. 780 mA
    • C. 47 mA
    • D. 7.06 A
      • Discuss
    • 10. An ammeter has an internal resistance of 50 Ω. The meter movement itself can handle up to 1 mA. If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately

    • Options
    • A. 55 Ω
    • B. 5.5 Ω
    • C. 50 Ω
    • D. 9 Ω
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.