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

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

A

Resistances provide the only opposition to current flow

B

Inductive reactance provides the only opposition to current flow

C

Combinations of resistance and inductive reactance provide any opposition to current flow

D

The ac voltage lags the current by 90 degree

E

None of the above

At series resonance, the inductive reactance and capacitive reactance are never equal.

A

True

B

False

Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

A

The voltage remains at one polarity and at a steady level

B

The voltage remains at one polarity but changes value periodically

C

The voltage causes current to flow in two directions at the same time

D

The voltage reverses polarity periodically

E

None of the above

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

A

The current in an ac circuit flows in one direction, but changes value periodically

B

The current in an ac circuit flows in one direction at a steady level

C

The current in an ac circuit changes direction periodically

D

The current in an ac circuit flows in two directions at the same time

E

None of the above

Which one of the following phrases most accurately describes a purely capacitive circuit?

A

Resistances provide the only opposition to current flow

B

Capacitive reactance provides the only opposition to current flow

C

The ac voltage leads the current by 90 degree

D

Combinations of resistance and capacitive reactance provide any opposition to current flow

E

None of the above

In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.

A

True

B

False

An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then

A

VR = VL

B

VL

C

VL = VR

D

VL > VR

Inductive reactance is measured in units of:

A

volts per second

B

amperes per second

C

Ohm

D

henrys

E

None of the above

The total inductive reactance of a parallel inductor circuit is:

A

equal to the sum of the individual inductive-reactance values

B

equal to the sum of the individual inductance values

C

equal to the source voltage divided by total current

D

less than the inductance value of the smallest inductor

E

None of the above

In a parallel RLC circuit, the smaller reactance determines the net reactance of the circuit.

A

True

B

False

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

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