GATE ECE 2006 | GATE ECE Year Wise Previous Years Questions

GATE ECE 2006

MCQ (Single Correct Answer)

-0.6

A mast antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting ground plane. It is base-fed at frequency of 600 kHz. The radiation resistance of the antenna in ohms is

$${{2\,\,{\pi ^2}} \over 5}$$

$${{\,\,{\pi ^2}} \over 5}$$

$${{4\,\,{\pi ^2}} \over 5}$$

$$20\,\,\,{\pi ^2}$$

GATE ECE 2006

MCQ (Single Correct Answer)

-0.3

A transmission line is feeding 1 Watt of power to a horn antenna having gain of 10 dB. The antenna is matched to the transmission line. The total power radiated by the horn antenna into the free-space is

10 Watts

1 Watt

0.1 Watt

0.01 Watt

GATE ECE 2006

MCQ (Single Correct Answer)

-0.3

Under low level injection assumption, the injected minority carrier current for an extrinsic semiconductor is essentially the

diffusion current

drift current

recombination current

induced current

GATE ECE 2006

MCQ (Single Correct Answer)

-0.3

The concentration of minority carriers in an extrinsic semiconductor under equilibrium is:

directly proportional to the doping concentration

inversely proportional to the doping concentration

directly proportional to the intrinsic concentration

inversely proportional to the intrinsic concentration

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2023