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Electromagnetic Field Theory

Electromagnetic Field Theory
An open wire transmission line having a characteristic impedance of 600 ohms is terminated by a resistive load of 900 O. The standing wave ratio will be

4.5
2.5
3.5
1.5

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Electromagnetic Field Theory
A sphere of radius with a uniform charge density ρv C/m3 shall have electric flux density at radius “r = a” equal to

 aρv/4 C/m2.
 aρv/3 C/m2.
 aρv C/m2.
 ρv/3 C/m2.

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Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 32 mH.
 3.2 mH.
 3.2 H.
 3.2 µH.

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Electromagnetic Field Theory
In above problem, if the inductance L1 and L2 in series aiding with 30 mH mutual inductance, then total inductance will be

 50 mH.
 150 mH.
 200 mH.
 100 mH.

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Electromagnetic Field Theory
Which of following circuit element stores energy in electro-magnetic field?

 Condenser.
 Inductor.
 Capacitor.
 Variable Resistor.

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Electromagnetic Field Theory
The property of the coil by which a counter emf is induced in it when the current through the coil changes is known as

 mutual inductance.
 capacitance.
 series aiding inductance.
 self inductance.

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