Electronic Principles
At room temperature an intrinsic silicon crystal acts approximately like

a conductor
a battery
an insulator
a piece of copper wire
None of these

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Electronic Principles
Which one of the following statements most accurately describes the nature of inductive reactance?

Inductive reactance is another term for counter emf
Inductive reactance is an opposition to current flow in ac circuits
Inductive reactance is a force that tends to overcome the effects of counter emf
Inductive reactance is an opposition to current flow in dc circuits
None of these

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Electronic Principles
The total capacitance of a series capacitor circuit is:

equal to the sum of the individual capacitance values
equal to the source voltage divided by total current
less than the value of the smallest capacitor
None of these
equal to the sun of the individual capacitive-reactance values

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

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

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