The resistivity of a material with resistance 200 ohm, length 10m and area twice that of the length is

Electronics and Communication Engineering (ECE) : Electromagnetic Field Theory - Quiz(MCQ)

200

300

400

500

Correct Answer : Option (C) : 400

Explanation : Resistance calculated from Ohm’s law and Stoke’s theorem will be R = ρL/A. To get resistivity, ρ = RA/L = 200 X 20/10 = 400.

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Radiation intensity in a given direction is the

Energy radiated per square metre

Power radiated per square metre

Power radiated per unit solid angle in that direction

None of the above

Correct Answer : Power radiated per unit solid angle in that direction

Which of the following impedance inversion is obtained?

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A quarter wave line

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Correct Answer : A quarter wave line

The wave in wave guide has

Larger frequency than in the free space

Diminishing wavelength than in the free space

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Larger wavelength than in the free space

Correct Answer : Larger wavelength than in the free space