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

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

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

None of these
The total voltage leads the total current by less than 90 degree
The total voltage is less 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 equal to the sum of the voltages across the resistance and capacitance

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

Combinations of resistance and inductive reactance provide any opposition to current flow
Resistances provide the only opposition to current flow
The ac voltage lags the current by 90 degree
None of these
Inductive reactance provides the only opposition to current flow

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Electronic Principles
For a pure capacitor:

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

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