# 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. $1.6\pm 0.1\text{ mA}$

 Q2. What is the value of the current $I$ (in $\mu$A) as shown in the following figure?
 A. 2.5 $\mu$A B. 3.5 $\mu$A C. 4.5 $\mu$A D. 5.5 $\mu$A

 Q3. What is the value of output voltage $V_0$?
 A. 0.45 V B. -0.45 V C. -90 V D. -45 V

 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

 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. $5+10\sin \omega t$

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