Q. For a coil having a magnetic circuit of constant reluctance, if the flux increases, what happens to the current?

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Q. The unit for inductance is ___________

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Q. If either the inductance or the rate of change of current is doubled, the induced e.m.f?

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Q. If the current changes from 5A to 3A in 2 seconds and the inductance is 10H, calculate the emf.

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Q. If the current changes from 5A to 3A in x sec and inductance is 10H. The emf is 10V, calculate the value of x.

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Q. If the current changes from 3A to 5A in 2s and the emf is 10V. Calculate the inductance.

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Q. As the number of turns in the coil increases, what happens to the inductance of the coil?

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Q. What happens to the inductance when the magnetic field strength decreases?

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Q. What happens to the inductance when the current in the coil becomes double its original value?

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Q. When the coil is wrapped around a ferromagnetic core, why is it difficult to determine the inductance?

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Q. What happens to the inductance as the area of the cross section of the coil increases?

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Q. What happens to the inductance as the length of the magnetic circuit increases?

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Q. If the current changes from 20A to 10A in 5 seconds and the value of inductance is 1H, calculate the emf induced.

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Q. When a ferromagnetic core is inserted into an inductor, what happens to the flux linkage?

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Q. What happens to the current when a ferromagnetic material is introduced within an inductor?

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Q. What is the relation between the flux and the magnetizing current when a ferromagnetic core is introduced within the inductor?

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Q. What happens to the effective inductance when a ferromagnetic core is introduced?

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Q. A laminated steel ring is wound with 200 turns. When the magnetizing current varies between 5 and 7 A, the magnetic flux varies between 760 and 800 Wb. Calculate the inductance of the coil.

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Q. Calculate the number of turns in an inductor with a ferromagnetic core when the inductance is 4000 H, the current changes from 5A to 7A and the flux changes from 760 to 800 Wb.

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Q. Calculate the change in current in an inductor having inductance 4000H, number of turns is 200 and the flux changes from 760 to 800 Wb.

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