Questions & Answers of Characteristics of Diodes, BJT, MOSFET

Question No. 133

The sinusoidal ac source in the figure has an rms value of 202  V. Considering all possible values of RL, the minimum value of RS in Ω to avoid burnout of the Zener diode is _________.

Question No. 139

Assuming the diodes to be ideal in the figure, for the output to be clipped, the input voltage vi must be outside the range

Question No. 145

A 10 kHz even-symmetric square wave is passed through a bandpass filter with centre frequency at 30 kHz and 3 dB passband of 6 kHz. The filter output is

Question No. 27

In the circuit shown below, the knee current of the ideal Zener diode is 10 mA. To maintain 5 V across RL, the minimum value of RL in Ω and the minimum power rating of the Zener diode in mW respectively are

Question No. 31

A voltage 1000sinωt Volts is applied across YZ. Assuming ideal diodes, the voltage measured across WX in Volts is

Question No. 18

The i-v characteristics of the diode in the circuit given below are

The current in the circuit is

Question No. 35

The transistor used in the circuit shown below has a β of 30 and ICBO  is negligible

If the forward voltage drop of diode is 0.7V, then the current through collector will be

Question No. 47

A clipper circuit is shown below.

Assuming forward voltage drops of the diodes to be 0.7 V, the input-output transfer characteristics of the circuit is

Question No. 24

Figure shows a composite switch consisting of a power transistor (BJT) in series with a diode. Assuming that the transistor switch and the diode are ideal, the I-V characteristic of the composite switch is

Question No. 8

The equivalent circuits of a diode, during forward biased and reverse biased conditions, are shown in the figure.

If such a diode is used in clipper circuit of figure given above, the output voltage V0 of the circuit will be(A)(A)





Question No. 40

Two perfectly matched silicon transistor are connected as shown in the figure. Assuming the β of the transistors to be very high and the forward voltage drop in diodes to be 0.7 V, the value of current I is

Question No. 41

In the voltage doubler circuit shown in the figure, the switch ‘S ’ is closed at t = 0. Assuming diodes D1 and D2 to be ideal, load resistance to be infinite and initial
capacitor voltages to be zero. The steady state voltage across capacitors C1 and C2 will be