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Electromagnetic Field Theory

Electromagnetic Field Theory
The Biot-savarts law is a general modification of

 Kirchhoffs law.
 Amperes law.
 Faradays law.
 Lenzs law.

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Electromagnetic Field Theory
Conductor is varying and field is fixed then emf will be induced. This principle is called

 both A and B.
 dynamically induced emf.
 static induced emf.
None of these

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Electromagnetic Field Theory
An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz supply. Neglected coil resistance, core loss, iron reluctance and leakage inductance. Find the current in the inductor.

 9.04 A.
 2.28 A.
 4.56 A.
 18.08 A.

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Electromagnetic Field Theory
Find the strength of the magnetic field when a 2m long conductor is moving with a velocity 4m/s inducing an emf of 20V.

 10T.
 5T.
 2.5T.
 0.5T.

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Electromagnetic Field Theory
A medium is said to be isotropic when

 ∈ is zero.
 ∈ is a scalar constant.
 ∈ = μ.
 ∈ = μσ.

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Electromagnetic Field Theory
When a single turn coil rotates in a uniform magnetic field at a uniform speed, the induced emf will be

 alternating.
 none of these.
 pulsating.
 steady.

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MORE MCQ ON Electromagnetic Field Theory

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