logo

CuriousTab

CuriousTab

Analog Electronics problems


  • 1. In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit

  • Options
  • A. all calculations done earlier have to be repeated
  • B. replace all calculated voltages by reverse values
  • C. replace all calculated currents by reverse values
  • D. replace all calculated voltages and currents by reverse values
  • Discuss
  • 2. An amplifier has a large ac input signal. The clipping occurs on both the peaks. The output voltage will be nearly a

  • Options
  • A. sine wave
  • B. square wave
  • C. triangular wave
  • D. (a) or (c)
  • Discuss
  • 3. If an amplifier with gain of - 1000 and feedback factor ? = - 0.1 had a gain change of 20% due to temperature, the change in gain of the feedback amplifier would be

  • Options
  • A. 10%
  • B. 5%
  • C. 0.2%
  • D. 0.01%
  • Discuss
  • 4. In the op-amp circuit of figure, V0 =
    Electronics and Communication Engineering Analog Electronics: In the op-amp circuit of figure, V0 =

  • Options
  • A. Vi
  • B. 3 Vi
  • C. 5 Vi
  • D. 0.5 Vi
  • Discuss
  • 5. To protect the diodes in a rectifier and capacitor input filter circuit it is necessary to use

  • Options
  • A. surge resistor
  • B. surge inductor
  • C. surge capacitor
  • D. both (a) and (b)
  • Discuss
  • 6. In figure v1 = 8 V and v2 = 4 V. Which diode will conduct?
    Electronics and Communication Engineering Analog Electronics: In figure v1 = 8 V and v2 = 4 V. Which diode will conduct?

  • Options
  • A. D2 only
  • B. D1 only
  • C. Both D1 and D2
  • D. Neither D1 nor D2
  • Discuss
  • 7. In figure ID = 4 mA. Then VS =
    Electronics and Communication Engineering Analog Electronics: In figure ID = 4 mA. Then VS =

  • Options
  • A. 20 V
  • B. 4.4 V
  • C. 0.4 V
  • D. 0.44 V
  • Discuss
  • 8. A half wave diode rectifier has a capacitance input filter. If input voltage is Vm sin ?t, PIV is

  • Options
  • A. Vm
  • B. 2 Vm
  • C. 3 Vm
  • D. 4 Vm
  • Discuss
  • 9. The efficiency of a full wave rectifier using centre tapped transformer is twice that in full wave bridge rectifier.

  • Options
  • A. True
  • B. False
  • Discuss
  • 10. The transistor of following figure in Si diode with a base current of 40 ?A and ICBO = 0, if VBB = 6V, RE = 2 k? and ? = 90, IBQ = 20 ?A then RB =
    Electronics and Communication Engineering Analog Electronics: The transistor of following figure in Si diode with a base current of 40 ?A and ICBO = 0,

  • Options
  • A. 200 k?
  • B. 265 k?
  • C. 150 k?
  • D. 100 k?
  • Discuss

First 2 3 4 5