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Electromagnetic Field Theory
Parabolic and lens antenna used at
Microwave frequency
Medium frequency
Low frequency
High frequency
Microwave frequency
Medium frequency
Low frequency
High frequency
Answer
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Related Question
Electromagnetic Field Theory
The coils having self inductance of 10 mH and 15 mH have an effective inductance of 40 mH, when connected in series aiding. What will be the equivalent inductance if we connect then in series opposing?
20 mH.
5 mH.
10 mH.
0 mH.
20 mH.
5 mH.
10 mH.
0 mH.
Answer
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Electromagnetic Field Theory
In H-plane metal plate lens the travelling wave front is
Totally retarded
Accelerated
Neither accelerated nor retarded
Retarded
Totally retarded
Accelerated
Neither accelerated nor retarded
Retarded
Answer
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Electromagnetic Field Theory
Electric field intensity (E) at ant point in an electric field is equal to
(potential gradient)1/3.
potential gradient.
(potential gradient)1/2.
(potential gradient)2.
(potential gradient)1/3.
potential gradient.
(potential gradient)1/2.
(potential gradient)2.
Answer
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Electromagnetic Field Theory
A copper disc is rotated rapidly below a freely suspended magnetic needle. The magnetic needle starts rotating with velocity
equal to that of disc and in the same direction.
equal to that of disc and in the opposite direction.
less than that of disc and in the same direction.
less than that of disc but in opposite direction.
equal to that of disc and in the same direction.
equal to that of disc and in the opposite direction.
less than that of disc and in the same direction.
less than that of disc but in opposite direction.
Answer
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Electromagnetic Field Theory
Find H for centre of solenoid having finite length d = 1 unit where N = no of turns = 500, I = 2 A.
None of these.
1000.
500.
100.
None of these.
1000.
500.
100.
Answer
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