Electromagnetic induction
The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as

Series aiding inductance
Self-inductance
Capacitance
Mutual inductance

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Electromagnetic induction
The inductance of a coil will increase under all the following conditions except

When the number of turns of the coil increase
When more area for each turn is provided
When permeability of the core increases
When more length for the same number of turns is provided

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Electromagnetic induction
An open coil has

Infinite resistance and zero inductance
Zero resistance and high inductance
Infinite resistance and normal inductance
Zero resistance and inductance

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