Q. Si transistor of following figure has a = 0.9 and ICE= 0, VEE = 5 V and VCC = 13 V, then RE will be if IEQ = 1 mA

View solution

Q. The 'h' parameters of the circuit shown in the figure are hib = 25 Ω, hfb = 0.999 and hob = 10¯⁶Ω The Voltage gain is

View solution

Q. Study the circuit of figure and examine the following statements:

1. It is an active low pass finer.
2. It is a second order filter.
3. The change in gain is 40 dB/decade.

Which of the above statements are correct?

View solution

Q. In a circuit of figure, Vs = 10 cos(ωt) power drawn by the 2Ω resistor is 4 watts. The power factor is

View solution

Q. In the op-amp circuit of figure, V0 =

View solution

Q. Figure shows the self bias circuit for CE amplifier and its equivalent circuit. VBB and RB respectively are

View solution

Q. Figure is a 24 Vr stabilized power supply. The zener is 24 V, 600 mW. The minimum zener current is 10 mA. Proper values R and maximum load current are

View solution

Q. In figure as the load resistance is changed

View solution

Q. In figure, voltage across R2 = + 10 V. If VBE = 0.7 V and VE = 0.7 V and RE = 10 kΩ, current through RE is

View solution

Q. In figure, transistor βdc = 100 and LED voltage when it is conducting is 2 V. Then the base current which saturates the transistor is

View solution

Q. In figure the dc emitter current of each transistor is about

View solution

Q. Assume that op-amp in figure is ideal. If input Vi is triangular, the output V0 will be

View solution

Q. In the diode circuit of figure the diodes are ideal. The average current through ammeter is

View solution

Q. The critical frequency of the circuit of figure is

View solution

Q. Find resistance RB to bring transistor to threshold of saturation VCB = 0, VBE = 0.7 V, a = 0.96

View solution

Q. In figure ID = 4 mA. Then VGS =

View solution

Q. In following circuit, RB will be if VCC = 10 V, VS = 2 V, RC = 5 kΩ, RS = 90 kΩ, β = 50, ICE = 0, VCEsat = 0.1 V

View solution

Q. In following figure, what will be R1 and R2 for maximum symmetrical swing if VCSat ≈ 0. Given that RE = 200 Ω, RC = 400 Ω, VCC = 20 V, β = 99

View solution

Q. Assertion (A): The circuit in figure produces repetitive narrow pulses when input is fed with sine or triangular waveform having peak value more than + V

Reason (R): The high gain op-amp produces voltages at two levels. If input is more than + V, the output is + 15 V otherwise the output is - 15 V.

View solution

Q. For CE amplifier of figure, the slope of ac load line is

View solution