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10th March 2016, 04:04 PM
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Bhabha Atomic Research Centre Question Papers Pdf
Hi I would like to have the previous year question paper for the Electronics and Electrical engineering discipline examination?
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10th March 2016, 04:04 PM
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Re: Bhabha Atomic Research Centre Question Papers Pdf
BARC-Bhabha Atomic Research Center Previous years Electronics and electrical question paper is as given below. BARC Electronics and electrical Question papers 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 × 4.5 cm) operating at 10 GHz is (A) 10 GHz. (B)9 GHz. (C) 10/9GHz. (D) 10/3GHz 12 The intrinsic impedance of free space is (A) 75 ohm. (B)73 ohm. (C)120 ? ohm. (D)377ohm 13 Which one of the following conditions will not guarantee a distortion less transmission line (A)R = 0 = G (B)RC = LG (C) very low frequency range (R>> ? L, G >> ? C) (D) very high frequency range (R<< ? L, G << ? C) 14 MOSFET can be used as a (a) current controlled capacitor (b) voltage controlled capacitor (c) current controlled inductor (d) voltage controlled inductors 15 In a common emitter, unbypassed resister provides (a)voltage shunt feedback (b)current series feedback (c)negative voltage feedback (d)positive current feedback 16 Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations in a) Only the temperature b) only the ? of the transistor c) Both Temperature & ? d) None of the above 17 For the circuit shown in Fig.4, the voltage across the last resistor is V.All resistors are of ? 1 .The Vs is given by (A) 13V. (B) 8V. (C) 4V. (D)1V 18 The network has a network function Z(s)=s(s+2)/(s+3)(s+4) (A)not a positive real function. (B)RL network. (C) RC network. (D)LC network 19 For a series R-C circuit excited by a d-c voltageof 10V, and with time-constant s, , ? the voltage across C at time ? = t is given by A.10(1-e-1) v B.10(2-e-2) v C.10-e-1volts D.1-e-1 20 A 2 port network using Z parameter representation is said to bereciprocal if A.Z11=Z22 B.Z12=Z21 C.Z12=-Z21 D.Z11–2Z22=0 |