ESE EC 2018 Achiever Study Plan: Electromagnetics Quiz 2

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Question 1

The phasor representation of ß(y,t) = āB₀cos(ώt – βy) is:

• AB = ă_x B₀e^-jβy
• BB = ă_x B₀e ^jβy
• CB = ă_x B₀e ^βy
• DB = ă_x /B₀e^-jβy

Question 2

Find the work done by the force field F(x, y, z) = (x − y², y − z², z − x²) on a particle that moves along the line segment from (0, 0, 1) to (2, 1, 0).

• A2/3 Joule
• B3/7 Joule
• C7/3 Joule
• D5/3 Joule

Question 3

In free space V/m. The average power crossing a circular area of square metres in the plane Z= constant is

• A16watt/m²
• B15 watt/m²
• C14 watt/m²
• D13 watt/m²

Question 4

If the length of dipole antenna is close to 1 wavelength, then:

• Ainput impedance tends to infinite
• Binput impedance is capacitive
• Cinput resistance increases
• Dinput reactance increases

Question 5

Which among the following waveguide velocities shows the relation Vg = c sin a?
i. free space velocity
ii. group velocity
iii. phase velocity

• Aboth i and iii
• Bonly i
• Cboth i and ii
• Dboth ii and iii

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