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GATE 2002 : Electronics And Communication Engineering

20 pages, 102 questions, 2 questions with responses, 2 total responses,

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For more files visit www.educationobserver.com/forum SECTION A (75 marks) 1. This question consists of TWENTY-FIVE sub-questions (1.1 1.25) of ONE mark each. For each of these sub-questions, four possible alternatives (A,B, C and D) are given, out of which ONLY ONE is correct. Indicate the correct answer by darkening the appropriate bubble against the question number on the left hand side of the Objective Response Sheet (ORS). You may use the answer book provided for any rough work, if needed. 1.1 The dependent current source shown in Figure 1.1 5 (a) delivers 80 W (b) absorbs 80 W + (c) delivers 40 W - V1=20V I V1 A 5 5 (d) absorbs 40 W 1.2 In figure 1.2, the switch was closed for a long time before opening at t = 0. the voltage Vx at t = 0+ is t=0 (a) 25 V (b) 50 V 2.5A (c) -50 V 20 (d) 0 V 5H - 20 + Vx 1.3 Convolution of x(t + 5) with impulse function (t 7) is equal to (a) x(t - 12) 1.4 (b) x(t + 12) (c) x(t - 2) (d) x(t + 2) Which of the following cannot be the Fourier series expansion of a periodic signal? (a) x(t) = 2cos t + 3 cos 3t (c) x(t) = cos t + 0.5 1.5 (b) x(t) = 2cos t + 7 cos t (d) x(t) = 2cos 1.5 t + sin 3.5 t In Figure 1.5, a silicon is carrying a constant current of 1 mA. When the temperature of the diode is 20 C, VD is found to be 700 mV. If the temperature rises to 40 C, VD becomes approximately equal to + (a) 740 mV (b) 660 mV 1mA VD (c) 680 mV (d) 700 mV -

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Additional Info : Solved GATE exam paper study guide - gate 2002 : electronics and comm. engg. free online question paper
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