40 Questions
In a pure inductive AC circuit, the current lags the voltage by how many degrees?
90 degrees
What is the role of a pure capacitor in an AC circuit?
Store electric power
What will be the maximum value of current in a circuit containing only a pure capacitor?
Im = Vm / XC
What is the impedance of an RC series circuit?
Z = R + Xc
Which of the following statements is true about an RL series circuit?
Voltage across the resistor is equal to current
What determines the total opposition to current flow in an RLC series circuit?
Impedance involving R, L, and C
What does XC represent in an RC series circuit?
Capacitive inductance
The current flowing through a pure inductive AC circuit will be maximum when sin(?t – p/2) equals:
1
What happens to a capacitor when the supply is off?
It discharges
How is the total voltage calculated in an RLC series circuit?
V = I*Z
What is the instantaneous value of an AC signal?
The value at one specific moment in time
In an AC circuit with only pure resistance, what happens to the phase difference between voltage and current?
There is no phase difference
What is the formula for calculating the average voltage in an AC circuit?
Vavg = 0.636 Vmax
What happens to the current in a purely inductive circuit when compared to the voltage?
Current lags behind the voltage by 90 degrees
What is the phase angle when XL is greater than XC in an RLC series circuit?
Positive
How is the RMS value of an AC wave calculated?
Square root of means of squares of instantaneous values
In a purely resistive circuit, what happens to the power dissipation?
Dissipated by the resistors
What happens to the power factor in an RLC series circuit when XL < XC?
It becomes leading
What is the value of the peak voltage compared to the peak-to-peak voltage in an AC signal?
Peak value is half of peak-to-peak value
What is the impedance of an RLC series circuit when XL = XC?
Zero
Which type of AC waveform equals its average value to zero after a complete cycle?
Sinusoidal waveforms
In an RLC series circuit, what type of circuit behavior results when XL < XC?
RC series circuit
What is the total opposition offered to the flow of current in an RLC circuit called?
Impedance
What does the phase angle being zero between voltage and current represent in an AC circuit?
No power loss
How are alternate current and voltage represented in a purely resistive AC circuit?
Move in the same direction
What is the reactance of the resistor in the given RLC series circuit?
200 Ohms
Which element voltage lags the current by 90 degrees in an RLC series circuit?
Capacitor
What is the power factor of the given RLC series circuit?
0.563
How does the circuit behave when XL > XC?
RL series circuit
What is the term for the highest positive or negative value obtained by an alternating quantity in a single full cycle?
Peak value
Which term refers to a collection of positive and negative values that completes one full cycle?
Full Cycle
What happens to the phase angle in an RLC series circuit when XL = XC?
Zero
What does the term 'Instantaneous value' represent in an AC circuit?
Current or voltage value at any given time
How is frequency defined for an alternating quantity?
Number of cycles per second
What is the waveform in an AC circuit?
Shape formed by alternating values
What term refers to the time taken by a voltage or current to complete one cycle in an AC system?
Time period
What is the peak-to-peak value in an AC signal?
Difference between peak values
Which parameter is measured in hertz or cycle per second in an AC circuit?
Frequency
What represents the shape created by plotting alternating voltage or current values against time or angle in an AC system?
Waveform
Which term denotes the maximum values of voltage and current in an AC circuit?
Peak value
Learn about the amplitude of a single-phase AC circuit, which represents the maximum positive or negative value in a full cycle. Explore the concept of instantaneous values, which are the voltage or current values at any given time.
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