GATE ECE 1998 | Uniform Plane Waves Question 57 | Electromagnetics

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GATE ECE 1998

MCQ (Single Correct Answer)

-0.3

The intrinsic impedance of copper at high frequencies is

purely resistive.

purely inductive.

complex with a capacitive component.

complex with an inductive component.

GATE ECE 1998

MCQ (Single Correct Answer)

-0.3

The polarization of a wave with electric field vector $$\overrightarrow E = {E_0}\,{e^{j\left( {\omega t - \beta z} \right)}}\left( {\overrightarrow {{a_x}} + \overrightarrow {{a_y}} } \right)$$ is

linear

elliptical

left hand circular

right hand circular

GATE ECE 1995

MCQ (Single Correct Answer)

-0.3

Copper behaves as a

conductor always.

conductor or dielectric depending on the applied electric field strength.

conductor or dielectric depending on the frequency.

conductor or dielectric depending on the electric current density.

GATE ECE 1995

MCQ (Single Correct Answer)

-0.3

The intrinsic impedance of a lossy dielectric medium is given by

$${{j\omega \mu } \over \sigma }$$

$${{j\omega \in } \over \mu }$$

$$\sqrt {{{j\omega \mu } \over {\sigma + j\omega \in }}} $$

$$\sqrt {{\mu \over \in }} $$

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