logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics ‣ Series Circuits See What Others Are Saying!
  • Question

  • If four 90 Ω resistors are connected in series across an 18 V source, the current equals ___.


  • Options
  • A. 50 mA
  • B. 0.2 A
  • C. 5 A
  • D. 20 A

  • Correct Answer
  • 50 mA 

    Explanation 
    By Ohm's law, V = IR.

I = V/R

Given, Four 90 ohm resisters in series. 

So, R = ( R1 + R2 + R3 + R4) = 4 x 90 = 360 ohms.

Therefore, I = 18/360 = 0.05 A [or] 50 milli amps.

    • More questions

    • 1. Clampers are often called peak detectors.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A transformer that has 700 turns in the primary and 35 turns in the secondary has a turns ratio of 20:1.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The operands in an addition operation consist of the augend and the addend.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. In a BJT, the collector current is approximately equal to the base current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. A sine wave has:

    • Options
    • A. four quadrants
    • B. two alternations
    • C. one period
    • D. all of the above
      • Discuss
    • 6. The greater the selectivity, the wider the bandwidth.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The unit of magnetic flux density is the weber.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. PROMs are volatile.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. A monostable multivibrator must be triggered.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Generally, increasing the resistance in a circuit will decrease the current.

    • Options
    • A. True
    • B. False
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.