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
The amount of magnetic flux that is not confined to the core material of an electromagnet
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

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Electronic Principles
Which one of the following is a direct statement of Ohm's law?

The algebraic sum of voltages in a loop is equal to zero
None of these
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 currents entering and leaving a point is equal to zero
The total resistance of a parallel circuit is less than the value of the smallest resistance

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