Exercise :: Exam Questions Papers - Exam Paper 5
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26. | Find E at P(1, 1, 1) caused by four identical 3 nC point charges located at P1(1, 1, 0), P2(- 1, 1, 0), P3(- 1, - 1, 0) P4(1, - 1, 0) |
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Answer: Option B Explanation: E = 6.82ax + 6.82ay + 32.89az V/m r = ax + ay + az r1 = ax + ay r2 = - ax + ay r3 = - ax - ay and r4 = ax - ay ∴ r - r1 = az; r - r2 = 2ax + az; r - r3 = 2ax + 2ay + az r - r4 = 2ay + az = 6.8ax + 6.8ay + 32.9az . |
27. | In the interconnection of ideal sources shown in the figure, it is known that the 60V source is absorbing power |
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Answer: Option A Explanation: Since 12A current is coming from one source and it is also known that 60V source is absorbing power i.e. current is flowing inside 60V source. 12 = x + 1 => I = 12 - x. |
28. | For the network shown below, if VD = 12 V and VGSQ = - 2 V value of RS will be |
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Answer: Option B Explanation: VGS = VG - IDRS - 2 = 5.44 - 2.22 X 10-3 X RS RS = 3.35 KΩ. |
29. | The causal system given below is __________ |
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Answer: Option A Explanation: It has only zeros at origin. Hence it is minimum phase system. |
30. | Find RL for maximum power transfer. |
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Answer: Option A Explanation: Use Y - Δ transformation RAB= (9 || 18) || (9 || 18) = 3 Ω. |