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  • Question

  • A dc chopper is feeding an RLE load. The current can become discontinuous if


  • Options
  • A. A dc chopper is feeding an RLE load. The current can become discontinuous if is high a is low E is h is high
  • B. a is low
  • C. E is high
  • D. none of the above

  • Correct Answer
  • none of the above 

    • More questions

    • 1. Which device has internal positive feedback?

    • Options
    • A. Two cavity klystron amplifier
    • B. Multi-cavity klystron amplifier
    • C. Reflex klystron amplifier
    • D. All of the above
      • Discuss
    • 2. Microwaves

    • Options
    • A. get reflected by ionosphere
    • B. are absorbed by ionosphere
    • C. are neither reflected nor absorbed by ionosphere
    • D. are both reflected and absorbed by ionosphere
      • Discuss
    • 3. Consider the common emitter amplifier shown below with the following circuit parameters: ? = 100, gm = 0.3861 A/V, r0 = ? rp = 259 ?, Rs = 1 k?, RB = 93 k?, RC = 250 ?, RL = 1 kW, C1 = ? and C2 = 4.7mF.

      The resistance seen by the source Vs is

    • Options
    • A. 258 ?
    • B. 1258 ?
    • C. 93 k?
    • D. ?
      • Discuss
    • 4. Push pull amplifier is

    • Options
    • A. voltage amplifier
    • B. current amplifier
    • C. power amplifier
    • D. none of the above
      • Discuss
    • 5. For a polyatomic gas, the equation relating dielectric constant ?r with molecular properties is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. Assertion (A): For most metals, Fermi energy EF is less than 10 eV.

      Reason (R): Fermi level of a metal is given by EF = 3.64 x 10-19 (n)2/3 where n is number of free electrons/m3 of metal.


    • 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
    • 7. Assertion (A): Copper is a good conductor of electricity.

      Reason (R): Copper has a face centred cubic lattice.


    • 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
    • 8. For a multiplate capacitor having n plates, A as area of each plate, the capacitance is proportional to

    • Options
    • A. n A
    • B. (n - 1) A
    • C. (n + 1) A
    • D.
      • Discuss
    • 9. In rectifier circuits, the rms value of ac component of output voltage is equal to

    • Options
    • A. Vrms
    • B. 0.5 Vrms
    • C. (Vrms - Vdc)0.5
    • D. (Vrms2 - Vdc2)0.5
      • Discuss
    • 10. Figure shows a composite capacitor. If CA, CB, CC are the capacitances of capacitors A, B, C, the overall capacitance C is

    • Options
    • A. C = CA + CB + CC
    • B. C = (CA + CB) CC
    • C. C =
    • D. C =
      • Discuss

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