Related Questions

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

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