Q.1
In a parallel RC circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is
Q.2
In a lag network, the output voltage lags the input voltage in phase.
Q.3
A 470 Ω resistor and a 0.2 µF capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is
Q.4
In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is
Q.5
An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:
Q.6
A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z?
Q.7
In the complex plane, the number 4 + j3 is located in the
Q.8
A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is
Q.9
A complex number represents a phasor quantity.
Q.10
A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 kΩ. Current flow in the circuit is
Q.11
The power factor (PF) indicates how much of the apparent power is true power.
Q.12
In the complex plane, the number 14 - j5 is located in the
Q.13
The polar form of a complex number consists of a real part and a j part.
Q.14
The circuit phase angle is the angle between the total current and the applied (source) voltage.
Q.15
A capacitor with 150 Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is
Q.16
A filter passes all frequencies.
Q.17
What is the value of the hypotenuse of a right triangle whose sides are 12 and 18?
Q.18
In a series RC circuit, when the frequency and the resistance are halved, the impedance
Q.19
A 2 kΩ resistor is in series with a 0.015 µF capacitor across a 15 kHz ac source. What is the magnitude of the total impedance and the phase angle?
Q.20
What is the angular difference between +j4 and -j4?
0 h : 0 m : 1 s