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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.
2.28 A.
4.56 A.
9.04 A.
18.08 A.
2.28 A.
4.56 A.
9.04 A.
18.08 A.
Answer
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Related Question
Electromagnetic Field Theory
The shape of B-H curve for air gap is
ellipse.
parabola.
hyperbola.
straight line.
ellipse.
parabola.
hyperbola.
straight line.
Answer
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Electromagnetic Field Theory
The tubes of force within the magnetic material are known as
none of them.
tubes of indication.
lines of force.
magnetic flux.
none of them.
tubes of indication.
lines of force.
magnetic flux.
Answer
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Electromagnetic Field Theory
Cork Screw rule is used to find
direction of electric field.
direction of magnetic field.
direction of emf.
direction of current.
direction of electric field.
direction of magnetic field.
direction of emf.
direction of current.
Answer
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Electromagnetic Field Theory
Materials subjected to rapid reversals of magnetism should have
high permeability.
both a and b.
low hysteresis loss.
low permeability.
high permeability.
both a and b.
low hysteresis loss.
low permeability.
Answer
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Electromagnetic Field Theory
A magnetic circuit requires 800 AT to produce a certain quantity of flux in a magnetic circuit. If its excitation coil has 100 turns and 5 Ohm resistance, the voltage to be applied in exciting coil is
40 V.
8 V.
80 V.
60 V.
40 V.
8 V.
80 V.
60 V.
Answer
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