When two vectors are perpendicular, their - Electromagnetic Field Theory

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

When two vectors are perpendicular, their

Cross product is zero

Dot product is zero

Both are zero

Both are not necessarily zero

Correct Answer : Option (B) : Dot product is zero

Explanation : Dot product of two perpendicular vectors is given by A.B = |a||b|cos 90, which is zero. Thus, dot product is zero and vectors are perpendicular.

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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?

Balun transformer

A quarter wave line

Short-circuited stub

A half wave line

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

Group velocity inversely proportional to wavelength

Larger wavelength than in the free space

Correct Answer : Larger wavelength than in the free space

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