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

None of these
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 circular magnetic field that surrounds a conductor carrying a current
The amount of magnetic flux that is not confined to the core material of an electromagnet

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Electronic Principles
Which one of the following statements is true for current flowing in a series circuit?

The total current in a series circuit is equal to the sum of the currents flowing through the individual components in the circuit
The same current flows through every part of a series circuit
The amount of current flow through each part of a series circuit can be different, depending on the resistance of each part and the amount of voltage applied to it
None of these
The total current in a series circuit is equal to the total voltage multiplied by the total resistance

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

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

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