Q.1
The capacitor voltage always leads the current by 90°.
Q.2
In the complex plane, the number 14 - j5 is located in the Fourth quadrant
Q.3
The resistor voltage is always out of phase with the current.
Q.4
When the frequency of the voltage applied to a series RC circuit is increased, the phase angle
Q.5
A 47 Ω resistor and a capacitor with 150 Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is
Q.6
Complex numbers can be added and subtracted but not multiplied or divided.
Q.7
A 12 kΩ resistor is in series with a 0.02 µF capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.3 ∠0° mA, what is the source voltage expressed in polar form?
Q.8
An imaginary number is one that exists only in the mind of the mathematician.
Q.9
For a certain load, the true power is 150 W and the reactive power is 125 VAR. The apparent power is
Q.10
Positive numbers can be represented by points to the right of the origin on the horizontal axis of a graph.
Q.11
Point +4 on the complex plane is
Q.12
The impedance of a series RC circuit varies directly with frequency.
Q.13
When the frequency of the voltage applied to a series RC circuit is decreased, the impedance
Q.14
Total current in an RC circuit always leads the source voltage.
Q.15
The complex number 40 ∠ 55° is equivalent to
Q.16
A 120 Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance?
Q.17
A 2 kΩ resistor and a 0.002 µF capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is
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