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  • Question

  • The time constant of the circuit in figure shown.
    The time constant of the circuit in figure shown. RC Time constant ? Req.C when V is shorted and R i


  • Options
  • A. RC
  • B. The time constant of the circuit in figure shown. RC Time constant ? Req.C when V is shorted and R i
  • C. The time constant of the circuit in figure shown. RC Time constant ? Req.C when V is shorted and R i
  • D. The time constant of the circuit in figure shown. RC Time constant ? Req.C when V is shorted and R i

  • Correct Answer
  •  

    Explanation
    Time constant ⟹ Req.C

    when V is shorted and R is seen from C then Req = R || R = R/2

    The time constant of the circuit in figure shown. RC Time constant ? Req.C when V is shorted and R i.

    Networks Analysis and Synthesis problems

    Search Results

    • 1. If the diameter of a wire is doubled, its current carrying capacity becomes

    • Options
    • A. one-fourth
    • B. half
    • C. twice
    • D. four times
      • Discuss
    • 2. Two materials having temperature coefficients of 0.004 and 0.0004 respectively are joined in series. The overall temperature coefficient is likely to be

    • Options
    • A. 0.08
    • B. 0.04
    • C. 0.001
    • D. 0.0001
      • Discuss
    • 3. Assertion (A): If E is available energy state eV and EF is Fermi level, then probability of energy state E being occupied = 0.5.

      Reason (R): .


    • Options
    • A. Both A and R are true and R is correct explanation of A
    • B. Both A and R are true but R is not correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true
      • Discuss
    • 4. The units of ?0 and ?r are

    • Options
    • A. H/m for both
    • B. H/m for ?r and no units for ?0
    • C. H/m for ?0 and no units for ?r
    • D. Wb/m for ?0 and no units for ?r
      • Discuss
    • 5. In a true valence crystal, the bonding between the atoms is accomplished by the sharing of valence electrons.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The rms value of wave in figure is

    • Options
    • A. about 95 V
    • B. about 80 V
    • C. about 50 V
    • D. about 25 V
      • Discuss
    • 7. A current is flowing through a conductor with non-uniform area of cross-section. Then

    • Options
    • A. current will be different at different cross-sections.
    • B. current will be the same at all the cross-sections.
    • C. current will be different but current density will be same at all the cross-sections
    • D. current will be the same but current density will be different at different cross-sections.
      • Discuss
    • 8. In an RC series circuit R = 100 ? and XC = 10 ?. In this circuit

    • Options
    • A. the current and voltage are in phase
    • B. the current leads the voltage by about 6°
    • C. the current leads the voltage by about 84°
    • D. the current lags the voltage by about 6°
      • Discuss
    • 9. In the circuit of figure, the switch is closed at t = 0. At t = 0+ the current through C is

    • Options
    • A. 4 A
    • B. 2.5 A
    • C. 3.1 A
    • D. 0
      • Discuss
    • 10. The current rating of a cable depends on

    • Options
    • A. length of cable
    • B. diameter of cable
    • C. both length and diameter of cable
    • D. none of the above
      • Discuss

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