Electronic Principles
Current is

An imbalance of electrical charges
None of these
The flow of charged particles through a material
The number of free electrons in an atom
The force that causes electrons to flow

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Electronic Principles
Which one of the following phrasers best describes flux density?

The concentration of lines of magnetic force
The rate of change of the number of lines of magnetic force
None of these
The force that maintains lines of force
The opposition to a build-up of magnetic fields

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

None of these
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The total voltage is greater than the sum of the voltages across the resistance and capacitance
The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is less than the sum of the voltages across the resistance and capacitance

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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 a positive 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
None of these

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