Electronic Principles
Which one of the following kinds of materials has the highest permeability?

All of these
A ferromagnetic material
None of these
A diamagnetic material
A paramagnetic material

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Electronic Principles
One henry of inductance is defined as:

the amount of inductance required to change the frequency of a current by 1 Hz
None of these
the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
the number of turns of wire in an inductor multiplied by the amount of current flowing through it
the amount of counter emf required to reduce a current to 1 A

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Electronic Principles
The total inductance of a series inductor circuit is:

equal to the sum of the individual inductive-reactance values
equal to the sum of the individual inductance values
equal to the source voltage divided by total current
None of these
less than the value of the smallest inductor

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