Practice Questions on Analog Circuits

Q1.

A circuit consists of a JFET which is to be connected with drain load resistor of 5 $ k\Omega $, and a supply voltage of $ V_{DD}  $= 30 V. $ V_D $ is to  be approximately 20 V, and is to remain constant within  $ \pm $1 V. The value of drain current is:

A.

$ 5.5\pm 0.1\text{ mA} $

B.

$ 3.6\pm 0.2\text{ mA} $

C.

$ 2\pm 0.2\text{ mA} $

D.

$ 1.6\pm 0.1\text{ mA} $

 View Ans

Q2.

What is the value of the current $I$ (in $\mu$A) as shown in the following figure?

OpAmp Output Voltage

A.

2.5 $\mu$A

B.

3.5 $\mu$A

C.

4.5 $\mu$A

D.

5.5 $\mu$A

 View Ans

Q3.

What is the value of output voltage $V_0$?

OpAmp Output Voltage

A.

0.45 V

B.

-0.45 V

C.

-90 V

D.

-45 V

 View Ans

Q4.

In a power transistor used in power amplifiers:

A.

The emitter region is lightly doped

B.

The base region is heavily doped

C.

The collector region is very thin

D.

None of these

 View Ans

Q5.

The diode in the circuit has non-linear characteristics 

The input voltage is $ V_i=2\sin \omega t $  V. The current through the diode is:

A.

$ 10+10\sin \omega t $

B.

$ 1+5\sin \omega t $

C.

$ 2+10\sin \omega t $

D.

$ 5+10\sin \omega t $

 View Ans


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