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547.

An independent voltage source in series with an impedance Z_s = R_s + jX_s delivers a maximum average power to a load impedance Z_L when
[1 mark]
(A) Z_s = R_s + jX_s
(B) Z_s = R_s
(C) Z_s = jX_s
(D) Z_s = R_s - jX_s

asked in Electronics and Communication Engineering, 2007

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548.

For the function e^-x , the linear approximation around x= 2 is : [1 mark]
(A) (3-x)e^-2
(B) 1-x
(C) [3+2√2 - x(1+√2)x]e^-2
(D) e^-2

asked in Electronics and Communication Engineering, 2007

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549.

Which one of the following function is strictly bounded? [1 mark]
(A) 1/x²
(B) e^x
(C) x²
(D) e^-x²

asked in Electronics and Communication Engineering, 2007

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550.

Lim_θ→0 Sin(θ/2)/θ is : [1 mark]
(A) 0.5
(B) 1
(C) 2
(D) not defined

asked in Electronics and Communication Engineering, 2007

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551.

For |x| << 1, coth (x) can be approximated as [1 mark]
(A) x
(B) x²
(C) 1/x
(D) 1/x²

asked in Electronics and Communication Engineering, 2007

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552.

The following plot shows a function y which varies linearly with x. The value of the integral

2

∫ ydx

1

is : [1 mark]

(A) 1.0
(B) 2.5
(C) 4.0
(D) 5.0

asked in Electronics and Communication Engineering, 2007

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806 1 ...‹‹90 9192 93 94 ›› ... 135

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