GATE ECE 1999 | GATE ECE Year Wise Previous Years Questions

GATE ECE 1999

MCQ (Single Correct Answer)

-0.6

A transmitting antenna radiates 251 W isotropically. A receiving antenna, located 100m away from the transmitting antenna, has an effective aperture of 500 cm². The total power received by the antenna is

10 nW

1 $$\mu $$ W

20 $$\mu $$ W

100 $$\mu $$ W

GATE ECE 1999

MCQ (Single Correct Answer)

-0.6

In air, a lossless transmission line of length 50 cm with $$L = 10\,\mu H/m,\,\,C = 40\,\,pF/m$$ is operated at 25 MHz. Its electrical path length is

0.5 meters

$$\lambda $$ meters

$$\pi /2$$ radians

180 degree

GATE ECE 1999

MCQ (Single Correct Answer)

-0.3

Identify which one of the following will NOT satisfy the wave equation.

$$50{e^{j\left( {\omega t - 3z} \right)}}$$

$$\sin \left[ {\omega \left( {10z + 5t} \right)} \right]$$

$$\cos \left( {{y^2} + 5t} \right)$$

$$\sin \left( x \right).\cos \left( t \right)$$

GATE ECE 1999

Subjective

-0

The average power of an omni-directional antenna varies as the magnitude of cos($$\theta $$) where $$\theta $$ is the azimuthal angle. Calculate the maximum Directive Gain of the antenna and the angles at which it occurs.

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