Sample Paper for BARC Online Exam

Hi I would like to have the sample questions for the online examination conducted by BARC for recruitment which is required for preparation?

[shikha]

The sample questions for the online examination conducted by BARC for recruitment which is required for preparation are as mentioned below:

1 Differential amplifiers are used in
a. instrumentation amplifiers
b. voltage followers
c. voltage regulators
d. buffers

2 The output voltage Vo of the above circuit is
a.-6V
b.-5V
c.-1.2V
d.-0.2V

3 The ideal OP-AMP has the following characteristics.
a) Ri=? ,A=? ,R0=0
b) Ri=0 ,A=? ,R0=0
c) Ri=? ,A=? ,R0=?
d) Ri=0 ,A=? ,R0=?

4 How many op-amps are required to implement this equation
A. 2
B. 3
C. 4
D. 1

5 A very brief, high voltage spike on an ac power line is called as
A. A bleeder
B. An arc
C. A transient
D. An avalanche
E. A clipped peak

6 You can find the zener diode in
A. The mixer in a superheterodyne receiver
B. The PLL in a circuit for detecting FM
C. The product detector in a receiver for SSB
D. The voltage regulator in a power supply
E. The AF oscillator in an AFSK transmitter

7 A network function can be completely specified by:
(A) Real parts of zeros
(B)Poles and zeros
(C)Real parts of poles
(D)Poles, zeros and a scale factor

8 A unit impulse voltage is applied to one port network having two linear components. If the current through the network is 0 for t<0 and decaysexponentially for t>0then the network consists of
(A) R and L in series
(B)R and L in parallel
(C)R and C in parallel
(D)R and C in series

9 The Q-factor of a parallel resonance circuit consisting of an inductance of value 1mH, capacitance of value 10-5 F and a resistance of 100 ohms is
(A) 1
(B)10
(C) ? 20
(D) 100

10 In a travelling electromagnetic wave, E and H vector fields are
(A) perpendicular in space .
(B) parallel in space.
(C) E is in the direction of wave travel.
(D) H is in the direction of wave travel.

11 The lower cut -off frequency of a rectangular wave guide with inside dimensions (3