Electronic Principles
Which one of the following kinds of materials has the lowest permeability?

All of these
None of these
A diamagnetic material
A feiTomagnetic material
A paramagnetic material

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Electronic Principles
When a parallel RLC circuit is operating at its resonant frequency:

the difference between inductive and capacitive reactance is equal to the resistance
inductive reactance is equal to the capacitive reactance
capacitive reactance is greater than the inductive reactance
inductive reactance is greater than the capacitive reactance
None of these

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

The current in an ac circuit flows in one direction, but changes value periodically
None of these
The current in an ac circuit changes direction periodically
The current in an ac circuit flows in one direction at a steady level
The current in an ac circuit flows in two directions at the same time

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

The total voltages is less than the sum of the voltages across the resistance and inductance
None of these
The total voltage is equal to the sum of the voltages across the resistance and inductance
The total voltage lags the total current by less than 90
The voltage always has the same amplitude and phase for every part of the circuit

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