Exercise :: Exam Questions Papers - Exam Paper 1
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1. | In the following non planar graph number of independent loop equations are |
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Answer: Option D Explanation: Number of independent loop equations are given by, L = B - N + 1 where L : No. of loop equations B : No. of branches = 12 N : No. of nodes = 8 L = 12 - 8 + 1 = 5. |
2. | A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1 Ω/m, if the line is distortion less, the attenuation constant (in Np/m) is |
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Answer: Option D Explanation: Distortion less a = RG and Z0 = RG →
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3. | A certain 8 bit uniform quantization PCM system can accommodate a signal ranging from - 1 V to + V. The rms value of the signal is |
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Answer: Option D Explanation: (SNR)dB = 1.76 + 6.02n n = 8 Thus (SNR)dB = 1.76 + 6.02 x 8 = 49.92 dB. |
4. | A rectangular waveguide, in dominant TE mode, has dimensions 10 cm x 15 cm. The cut off frequency is |
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Answer: Option B Explanation: For TE10 mode |
5. | A radar receiver has a noise figure of 10 dB at 300 K having a bandwidth of 2.5 MHz. The minimum power it can receive is |
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Answer: Option D Explanation: Pm = kT0Δf(F - 1) = 93.15 x 10-15 W. |