Gate

?EC-Paper Code-B? GATE 2011 www.gateforum.com Q. No. 1 25 Carry one Mark Each 1. Consider the following statements regarding the complex Poynting vector P for the major power radiated by a present citation in an infinite homogeneous and lossless medium. Re P denotes the real take apart of P . S denotes a global surface whose () ? centre is at the horizontal surface source, and n denotes the building block surface normal on S. Which of the following statements is TRUE? () (B) Re (P ) increases with change magnitude radial step to the fore keep from the source (C) ?? Re (P ) .n dS remains uniform at all radial blank from the source (A) Re P remains constant at any radial distance from the source s (D) ?? Re (P ) .n dS s decreases with increasing radial distance form the source dish out: - (D) Exp: - ?? S ˆ Re P .nds gives average power and it decreases with increasing radial () distance from the source 2. A transmissio n stress of characteristic impedance 50? is terminated by a 50? load. When excited by a sinusoidal electromotive wedge source at 10GHz, the phase difference ? between heller points spaced 2mm apart on the puff is found to be radians. The 4 phase velocity of the wave along the cables length is (A) 0.

8 × 108 m / s Answer: - (C) Exp: - Z0 = 50? ; ZL = 50? For ? radians the distance is 2mm 4 ? 2 × ? × 1010 = = 16 × 10?7 = 1.6 × 108 m / s 2? ? 16 × 10?3 (B) 1.2 × 108 m / s (C) 1.6 × 108 m / s (D) 3 × 108 m / s The phase velocity vP = 3. An analog signal is band-limited to 4kHz, attemptd at the Nyquist rate and the samples be qua! ntized into 4 levels. The quantized levels argon assumed to be independent and equally probable. If we transmit 2 quantized samples per second, the information rate is ________ bits / second. (A) 1 (B) 2 (C) 3 (D) 4 Answer: - (D) Exp: - Since two samples are transmitted and severally sample has 2 bits of information, then the information rate is 4 bits/sec. © entirely rights reserved by Gateforum Educational Services Pvt. Ltd. No part of this...If you want to get a full essay, run it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay