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Home ‣ Electronics and Communication Engineering ‣ Networks Analysis and Synthesis Comments
  • Question

  • 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.

  • Correct Answer
  • current will be the same but current density will be different at different cross-sections. 

    Explanation
    Current density = current/area of cross-section. Same current throughout the conductor.

    Since, area of cross-section is non-uniform, current density will be different at different cross-sections.

    Networks Analysis and Synthesis problems

    Search Results

    • 1. 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
    • 2. The time constant of the circuit in figure shown.

    • Options
    • A. RC
    • B.
    • C.
    • D.
      • Discuss
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. Henry is equivalent to

    • Options
    • A. Volts/Ampere
    • B. Weber/Volt
    • C. Weber/Ampere
    • D. Weber/Ampere2
      • Discuss
    • 10. When a current source I is suddenly connected across a two terminal relaxed RC circuit at time t = 0, the voltage across the current source is shown in figure. The RC circuit is

    • Options
    • A. a series combination of R and C
    • B. a parallel combination of R and C
    • C. a series combination of R and parallel combination of R and C
    • D. a pure capacitor
      • Discuss

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