Exercise :: Exam Questions Papers - Exam Paper 12
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11. | The reduced form of the function |
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Answer: Option A Explanation: X =(A + B + D)(A + B + D) (A + B + C + D) =(D + A D + B D + AB + A D + A B + B D) (A + B + C + D) =(D + AB + A B)(A + B + C + D)
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12. | Consider the probability density f(x) = ae-b|x| where x is a random variable whose allowable values range from x = - ∞ to x = + ∞. The Cdf (Cumulative distribution function) for x ≥ 0 is : |
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Answer: Option B Explanation:
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13. | The electric field of uniform plane wave is given by E = 20 sin (2 p x 108t- pz) |
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Answer: Option C Explanation: ∴ H = Hx + Hy
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14. | Find I for circuit shown below |
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Answer: Option C Explanation: Mesh Analysis Apply KVL at loop 2 125i2 - 100i3 = 0 ...(i) Apply KVL at loop 3 120i3 - 100i2 - 20i1 = 0 i1 = 5A ∴ 120i3 - 100i2 - 100 = 0 ∴ 120i3 - 100i2 = 100 ...(ii) From (i) 125i2 - 100i3 = 0
Put equation (iii) in eq. (ii) 120i 3 - 100i2 = 100 120 x 150i2 - 100i2 = 100 ∴ 50i2 = 100 ∴ i2 = 2A. |
15. | A n-type silicon sample contains a donor concentration of Nd = 2 x 1016 cm-3. The minority carrier hole lifetime is tp0 = 5 μs. The thermal equilibrium generation rate of hole is: |
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Answer: Option D Explanation:
Then thermal generation rate
= 2.25 x 109 cm3 S-1 . |