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

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

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

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 in a loop is equal to zero
None of these
The algebraic sum of voltages entering and leaving a point is equal to zero

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