One Stop GATE Forum: Electromagnetics

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Que. 1      In telephones,the dial tone has a freq. of
A         1hz
B         13 hz
C         33 hz
D         133 hz

Que. 2     the transmitting antenna to be used for telivision broadcast is necessarily
A         a parabolic reflector
B         a high directive antenna
C         an omnidirectional antenna
D         none of these

Que. 3     A standard refrences antenna for directivity is
A         element doublet
B         half wave dipole
C         isotropic antenna
D         Rhombic antenna

Que.4     maximum voltage is induced in a loop antenna if it is placed
A         parallel to the incoming wave
B         all right angles to the incoming wave
C         at 45degree  to the incoming wave
D         none of the above

Que. 5     the advantage of marconi antenna over the ungrounded antenna is that
A         only one fourth of the height is required as compared  ungrounded 
antenna
B         one half of the height is required as compared  ungrounded antenna
C         no capacitance is required
D         none of the above

Que. 6     The antenna best guided by a wave guide
A         biconical
B         horn
C         helical
D         discone

Que. 7     Night effect is most prominent in
A         Adcock antenna
B         vertical antenna
C         loop antenna
D         all of these

Que. 8     UHF and microwaves in the freq. range 300mHz to 30 Ghz can be best transmitted 
using
A         sky wave propagation
B         ground wave propagation
C         duct propagation
D         none of these propagation

Que. 9     In a medium if e.u and 0- are constant through out the medium then it 
is known as
A         perfect medium
B         distributed medium
C         homogeneous medium
D         dielectric medium

Que. 10     When an electromagnetic wave travelling in one medium strikes upon a secound 
medium      the wave will be
A         totally transmitted
B         totally reflected
C         neither transmitted nor reflected
D         partially transmitted and partially reflected 

Author	Message
Neha Agarwal Groupie Joined: 04Jan2007 Online Status: Offline Posts: 59	Topic: Electromagnetics - GATE Sample qns Posted: 13Feb2007 at 5:36pm
	Que. 1 In telephones,the dial tone has a freq. of A 1hz B 13 hz C 33 hz D 133 hz Que. 2 the transmitting antenna to be used for telivision broadcast is necessarily A a parabolic reflector B a high directive antenna C an omnidirectional antenna D none of these Que. 3 A standard refrences antenna for directivity is A element doublet B half wave dipole C isotropic antenna D Rhombic antenna Que.4 maximum voltage is induced in a loop antenna if it is placed A parallel to the incoming wave B all right angles to the incoming wave C at 45degree to the incoming wave D none of the above Que. 5 the advantage of marconi antenna over the ungrounded antenna is that A only one fourth of the height is required as compared ungrounded antenna B one half of the height is required as compared ungrounded antenna C no capacitance is required D none of the above Que. 6 The antenna best guided by a wave guide A biconical B horn C helical D discone Que. 7 Night effect is most prominent in A Adcock antenna B vertical antenna C loop antenna D all of these Que. 8 UHF and microwaves in the freq. range 300mHz to 30 Ghz can be best transmitted using A sky wave propagation B ground wave propagation C duct propagation D none of these propagation Que. 9 In a medium if e.u and 0- are constant through out the medium then it is known as A perfect medium B distributed medium C homogeneous medium D dielectric medium Que. 10 When an electromagnetic wave travelling in one medium strikes upon a secound medium the wave will be A totally transmitted B totally reflected C neither transmitted nor reflected D partially transmitted and partially reflected
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