One Stop GATE Forum: Electromagnetics

Message

   Que. 31  The shortest stub length in (lemda) required to produce a reactance = 
Z(0)  is
A         (lemda)
B         (lemda)/8
C         (lemda)/4
D         2*(lemda)

Que. 2     The signals contaminated with large noise are demodulated by
A         envelope dector
B         synchronous dector
C         envelope dector followed by low pass filter
D         envelope dector followed by high pass filter

Que. 3     The effect of ground on radiation pattern is
A         to increas its wavelength
B         to produce more number of nulls
C         to cause cancellation of radiation alone the around
D         both b and c above

Que. 4     the ground wave coverage of the medium wave transmitter is 100 km and 
in the night the        first reflected ray is at 800km the skip distance 
is
A         900km
B         700km
C         100km
D         800km

Que. 5     Which of the following has the least wavelength
A         X-Rays
B         Ultra-violet
C         infra-red
D         UHF

Que. 6     The charecteristic impedance of a transmission line is
A         directly proportional to it's length
B         inversly proportional to it's length
C         independent of its length
D         non of these

Que. 7     Zoning is used with a dielectric anteena in order to
A         permit pin point focusing
B         reduce the bulk of the lens
C         increase the band width of the lens
D         correct the curvature of the wave front from the horn that is 
too short

Que. 8     Cassegrain feed is used with a parabolic reflector to
A         reduce the size of the main reflector
B         increase the gain of the system
C         increase the beam width of the system
D         allow the feed to be placed at a convenient point

Que. 9     A prominent wave should have
A         no phase shift
B         no attenuation
C         highest cutoff freq.
D         lowest cutoff feq.

Que. 10     Circular polarization is said to occure if
A         the magnitude of the two waves is the same
B         the phase of the two waves is the same
C         the magnitude is the same and  the phase different is zero
D         the magnitude is the same and  the phase is

Author	Message
Neha Agarwal Groupie Joined: 04Jan2007 Online Status: Offline Posts: 59	Topic: Electromagnetics - GATE Sample qns Posted: 13Feb2007 at 5:37pm
	Que. 31 The shortest stub length in (lemda) required to produce a reactance = Z(0) is A (lemda) B (lemda)/8 C (lemda)/4 D 2*(lemda) Que. 2 The signals contaminated with large noise are demodulated by A envelope dector B synchronous dector C envelope dector followed by low pass filter D envelope dector followed by high pass filter Que. 3 The effect of ground on radiation pattern is A to increas its wavelength B to produce more number of nulls C to cause cancellation of radiation alone the around D both b and c above Que. 4 the ground wave coverage of the medium wave transmitter is 100 km and in the night the first reflected ray is at 800km the skip distance is A 900km B 700km C 100km D 800km Que. 5 Which of the following has the least wavelength A X-Rays B Ultra-violet C infra-red D UHF Que. 6 The charecteristic impedance of a transmission line is A directly proportional to it's length B inversly proportional to it's length C independent of its length D non of these Que. 7 Zoning is used with a dielectric anteena in order to A permit pin point focusing B reduce the bulk of the lens C increase the band width of the lens D correct the curvature of the wave front from the horn that is too short Que. 8 Cassegrain feed is used with a parabolic reflector to A reduce the size of the main reflector B increase the gain of the system C increase the beam width of the system D allow the feed to be placed at a convenient point Que. 9 A prominent wave should have A no phase shift B no attenuation C highest cutoff freq. D lowest cutoff feq. Que. 10 Circular polarization is said to occure if A the magnitude of the two waves is the same B the phase of the two waves is the same C the magnitude is the same and the phase different is zero D the magnitude is the same and the phase is
	For more papers visit: http://onestopgate.com/gate-preparation// Post Resume: Click here to Upload your Resume & Apply for Jobs

	IP Logged


One Stop GATE Forum : GATE Previous Years Test Papers - Discuss Here : ECE Papers