GATE ECE 1988 | GATE ECE Year Wise Previous Years Questions

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GATE ECE 1988

MCQ (Single Correct Answer)

-0.6

Vector potential is a vector

whose curl is equal to the magnetic flux density

whose curl is equal to the electric field intensity

whose divergence is equal to the electric potential

which is equal to the vector product E x H

GATE ECE 1988

MCQ (More than One Correct Answer)

-0.6

On either side of a charge-free interface between two media,

the normal components of the electric field are equal

the tangential components of the electric field are equal

the normal components of the electric flux density are equal

the tangential components of the electric flux density are equal

GATE ECE 1988

MCQ (More than One Correct Answer)

-0.6

For a normal mode EM wave propagating in a hollow rectangular wave guide

the phase velocity is greater than the group velocity

the phase velocity is greater than velocity of light in free space

the phase velocity is less than the velocity of light in free space

the phase velocity may be either greater than or less than the group velocity

GATE ECE 1988

Subjective

-0

A rectangular waveguide with cross-section dimensions 5 cm by 3 cm is filled with a dielectric of relative permittivity 3.
(i) Determine the cutoff frequency of the$$T{E_{11}}$$ mode.
(ii) Determine the frequency at which this / mode has an attenuation of $$3\,\pi $$ nepers/m.

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2023