Due to which of the following reasons a lightning conductor on top of a building is made into a pointed spike? - Electromagnetic Field Theory

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

Due to which of the following reasons a lightning conductor on top of a building is made into a pointed spike?

A)

Rain drops may not collect

B)

Dust particles may not accumulate

C)

Charge per unit area becomes very high for lightening to discharge

D)

None of the above

Correct Answer : Option (C) : Charge per unit area becomes very high for lightening to discharge

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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 : Power radiated per unit solid angle in that direction

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 : A quarter wave line

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 : Larger wavelength than in the free space

ECE MCQ's

Power Electronics

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Microprocessors

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Signals and Systems

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Communication Systems

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