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367.

Let, Then (a+b)= [2 marks]
(A) 7/20
(B) 3/20
(C) 19/60
(11) 11/20

asked in Electronics and Communication Engineering, 2005

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368.

Given the matrix , the eigen vector is [2 marks]

asked in Electronics and Communication Engineering, 2005

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369.

In what range should Re(s) remain so that the Laplace transform of the function e^(a+2)(t+5) exists ? [2 marks]
(a) Re (s) > a + 2
(b) Re (s) > a + 7
(c) Re (s) < 2
(d) Re (s) > a + 5

asked in Electronics and Communication Engineering, 2005

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370.

Refractive index of glass is 1.5. Find the wavelength of a beam of light with a frequency of 10¹⁴ Hz in glass. Assume velocity of light is 3×10⁸ m/s in vacuum. [1 mark]
(a) 3 µm
(b) 3 mm
(c) 2 µm
(d) 1 µm

asked in Electronics and Communication Engineering, 2005

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371.

Many circles are drawn in a Smith chart used for transmission line calculations. The circles shown in figure represent

[1 mark]
(a) unit circles.
(b) constant resistance circles.
(c) constant reactance circles.
(d) constant reflection coefficient circles.

asked in Electronics and Communication Engineering, 2005

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372.

The magnetic field intensity vector of a plane wave is given by
H (x,y,z,t) = 10 sin( 50000t + 0.04x + 30)p̂_y, where where p̂_y denotes the unit vector in y direction. The wave is propagating with a phase velocity
[1 mark]
(A) 5×10⁴ m/s
(B) 3×10⁸ m/s
(C) -1.25×10⁷ m/s
(D) -3×10⁸ m/s

asked in Electronics and Communication Engineering, 2005

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