When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle

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

In a circuit a 33 Q resistor carries a current of 2 A.. The voltage across the resistor is

A

33 V

B

66 V

C

80 V

D

132 V

In a Y-connected circuit, between each line voltage and the nearest phase voltage, there is a phase angle of

A

0°

B

30°

C

60°

D

120°

An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is

A

Good

B

Open

C

Shorted

D

Partly shorted

L is older than M and taller than N. O is younger than P, older than N and shorter than Q. R is older than S, younger than N, shorter than S and taller than Q. S is older than L, M, O, P, Q, R and S is necessarily false?

A

O is the shortest of the group.

B

N is the second tallest of the group.

C

L is the tallest of the group.

D

Q is the third oldest of the group.

The resistor voltage in an RL circuit is always out of phase with the current.

A

True

B

False

The circuit phase angle is the angle between the total current and the applied (source) voltage.

A

True

B

False

Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?

A

E = PR

B

E = I²R

C

I = E/R

D

I = ER

E

None of the above

The total inductance of a series inductor circuit is:

A

equal to the sum of the individual inductance values

B

equal to the sum of the individual inductive-reactance values

C

less than the value of the smallest inductor

D

equal to the source voltage divided by total current

E

None of the above

When the frequency of the voltage applied to a series RL circuit is increased, the phase angle

A

Decreases

B

Increases

C

Does not change

D

Cannot be determined without values

When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle

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