Unit 2 - Practice Quiz

1 In the context of AC circuits, which notation is conventionally used to represent the instantaneous value of a voltage?

2 What is the relationship between angular frequency () and linear frequency ()?

3 The time taken by an alternating quantity to complete one full cycle is called:

4 The maximum value attained by an alternating quantity during a positive or negative half cycle is known as:

5 For a sinusoidal voltage , what is the Root Mean Square (RMS) value?

6 The average value of a sinusoidal alternating current over one complete cycle is:

7 The average value of a sinusoidal voltage over a half cycle is given by:

8 Which factor is defined as the ratio of RMS value to the Average value?

9 What is the peak factor (crest factor) of a sinusoidal waveform?

10 Two sinusoidal quantities are said to be in phase quadrature if their phase difference is:

11 In the complex representation of impedance , what does the operator '' represent?

12 What is the complex impedance of an ideal inductor with inductance at angular frequency ?

13 What is the complex impedance of an ideal capacitor with capacitance ?

14 In a purely resistive AC circuit, what is the phase difference between voltage and current?

15 In a series RL circuit, the current:

16 The magnitude of impedance in a series RL circuit is given by:

17 In a series RC circuit, the phase angle is given by:

18 Which of the following describes the power factor of a series RC circuit?

19 The total voltage applied to a series RL circuit with resistor voltage and inductor voltage is:

20 For a series RLC circuit, the total impedance is:

21 In a series RLC circuit, if , the circuit behaves as:

22 What is the condition for resonance in a series RLC circuit?

23 At resonance, the impedance of a series RLC circuit is:

24 What is the resonant frequency of a series RLC circuit?

25 At series resonance, the current in the circuit is:

26 The power factor of a series RLC circuit at resonance is:

27 The Quality Factor (Q-factor) of a series resonant circuit is given by:

28 In AC circuits, Active Power (Real Power) is calculated as:

29 The unit of Reactive Power () is:

30 Apparent Power () is the product of:

31 Power factor is defined as the ratio of:

32 If the power factor is 0.8 lagging, it means:

33 In a three-phase system, the voltages of the three phases are displaced from each other by:

34 The order in which the voltages in the three phases reach their maximum positive value is called:

35 In a Star (Wye) connected three-phase system, the relationship between Line Current () and Phase Current () is:

36 In a Star (Wye) connected system, the Line Voltage () relates to the Phase Voltage () as:

37 In a Delta (Mesh) connected three-phase system, the relationship between Line Voltage () and Phase Voltage () is:

38 In a Delta (Mesh) connected system, the Line Current () relates to the Phase Current () as:

39 The total active power in a balanced three-phase circuit (Star or Delta) is given by:

40 Which three-phase connection requires four wires (3 phases + 1 neutral)?

41 What is the unit of Admittance ()?

42 The real part of Admittance is called:

43 If the frequency of the AC supply is increased, the capacitive reactance ():

44 If the frequency of the AC supply is increased, the inductive reactance ():

45 Which of the following represents the bandwidth of a series RLC circuit?

46 At half-power frequencies in a series RLC circuit, the current is:

47 The phase angle between Line Voltage and Phase Voltage in a Star connected system is:

48 In a circuit with , what is the magnitude of the impedance?

49 Instantaneous power in a pure resistive circuit is always:

50 What is the value of the 'operator ' squared ()?