Electronic Principles
What is the smallest number of polarities required for current flow?

Two - a negative terminal and a positive terminal
Three - negative, positive and neutral terminals
Four - two negative and two positive
One - a negative terminal
None of these

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Electronic Principles
The total inductance of a series inductor circuit is:

less than the value of the smallest inductor
equal to the source voltage divided by total current
equal to the sum of the individual inductive-reactance values
None of these
equal to the sum of the individual inductance values

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Electronic Principles
For a pure capacitor:

None of these
ac current leads the voltage by 90 degree
ac current lags the voltage by 90 degree
ac current is converted to dc voltage
ac current and voltage are exactly in phase

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Like magnetic poles repel, while unlike poles attract
Like magnetic poles attract, while unlike poles repel
Current is induced in a conductor that is moving through a magnetic field
None of these
Current flowing through a conductor generates a magnetic field

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Electronic Principles
Which one of the following statements is true for voltage in a parallel circuit?

None of these
The total voltage in a parallel circuit is always less than the value of the smallest voltage
The total voltage in a parallel circuit is equal to the average value of the individual voltages
The total voltage of a parallel circuit is the same as the voltages across each branch
The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit

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