Electromagnetics [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 82 - 85 of 96

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Question 82

Electromagnetics
Differential and Integral Forms and Their Interpretation

Appeared in Year: 2017

Question

Numeric Answer▾

An electron is moving in free space with velocity towards a stationary electron far away. The closest distance that this moving electron gets to the stationary electron before the repulsive force diverts its path is … .

Question 83

Electromagnetics
Gain and Directivity

Appeared in Year: 2015

Question

MCQ▾

The directivity of an antenna array can be increased by adding more antenna elements, as a larger number of elements

Choices

Choice (4)Response

a.

Results in a better impedance matching

b.

Increases the effective area of the antenna

c.

Improves the radiation efficiency

d.

Allows more power to be transmitted by the antenna

Question 84

Electromagnetics
Wave Equation

Appeared in Year: 2017

Question

Numeric Answer▾

The voltage of an electromagnetic wave propagating in a coaxial cable with uniform characteristic impedance is Volts, where is the distance along the length of the cable in metres, is the complex propagation constant, and frequency. The absolute value of the attenuation in the cable in is …

Question 85

Electromagnetics
S-Parameters, Smith Chart
Edit

Appeared in Year: 2017

Question

Numeric Answer▾

A two wire transmission line terminates in a television set. The VSWR measured on the line is 5.8. The percentage of power that is reflected from the television set is …

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