Which of the following should dominant wave have? - Electromagnetic Field Theory

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

Which of the following should dominant wave have?

A)

Highest cut off frequency

B)

No attenuation

C)

Lowest cut off frequency

D)

No phase shift

Correct Answer : Option (C) : Lowest cut off frequency

Explanation : Lowest cut off frequency or highest wave-length in a waveguide gives dominant modes.

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Q .

Radiation intensity in a given direction is the

A)

Energy radiated per square metre

B)

Power radiated per square metre

C)

Power radiated per unit solid angle in that direction

D)

None of the above

Correct Answer : Option (C) : Power radiated per unit solid angle in that direction

Q .

Which of the following impedance inversion is obtained?

A)

Balun transformer

B)

A quarter wave line

C)

Short-circuited stub

D)

A half wave line

Correct Answer : Option (B) : A quarter wave line

Q .

The wave in wave guide has

A)

Larger frequency than in the free space

B)

Diminishing wavelength than in the free space

C)

Group velocity inversely proportional to wavelength

D)

Larger wavelength than in the free space

Correct Answer : Option (D) : Larger wavelength than in the free space

ECE MCQ's

Power Electronics

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