Test: Analog Electronics - 7 - Electrical Engineering (EE) MCQ

In feedback amplifier the closed loop gain is nearly independent of open loop gain and depends only on the feedback factor.

In a N-P-N transistor, when emitter junction is forward biased and collector junction is reverse biased, the transistor will operate in

A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What percentage negative feedback should be introduced to the amplifier so that linear oscillations result?

The advantage of Weinbridge oscillator over the phase shift oscillator is that oscillator the frequency may be varied over a range of

In figure the input and output Miller capacitances are

An inverting amplifier has R₁ = 10 kΩ, and R_f = 150 kΩ then the O/P voltage, if input voltage V_i = 1 volt.

Figure uses 10 V zener diode. The minimum and maximum current through series resistance are

When Z₁ << Z, The circuit of figure works as

In a class C operation V_CC = 40 V, R_L = 50 Ω. The maximum load power can be

IF V_CC = 15 V, V_CEQ = 5 V and I_CQ = 50 mA, the efficiency in class A operation is

A bridge rectifier circuit has a dc load current of 10 mA and a filter capacitance of 1000 μF. The peak to peak ripple voltage is

Which of the following best represents the bandwidth of an actual op-amp?

For an ideal noise free transistor amplifier the noise factor is

In a crystal

Voltage V_L in the circuit when V_s < 0 where D is an ideal diode. (Take R₁ = R_s = R_L = 1 Ω)

Ultra high frequency oscillators work in the range

N-channel FETs are superior to p-channel FETs because

For the amplifier in figure, β = 800. The mid-band voltage gain V₀/V_i is

In the circuit of figure, v₀ =

Class C amplifier is suitable for

In a N-P-N transistor, when emitter junction is forward biased and collector junction is reverse biased the transistor will operate in

A Wien bridge is suitable for