Electronic Principles
Doubling the number of turns of wire in an inductor:

None of these
multiplies the value of inductance by four
multiplies the value of inductance by two
reduces the value of inductance by one-fourth
reduces the value of inductance by one-half

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Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

An electron has a positive charge and a proton has no charge
An electron has a negative charge and a proton has no charge
An electron has a positive charge and a proton has a negative charge
An electron has a negative charge and a proton has a positive charge
None of these

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Electronic Principles
Which one of the following is a statement of KirchhofFs voltage law?

The algebraic sum of voltages in a loop is equal to zero
The total voltage in a parallel circuit is less than the value of the smallest voltage
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
The algebraic sum of voltages entering and leaving a point is equal to zero
None of these

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

None of these
The circular magnetic field that surrounds a conductor carrying a current
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
The force of attraction between the poles of a permanent and temporary magnetic field
The amount of magnetic flux that is not confined to the core material of an electromagnet

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