# EE SHORT NOTES-A.C. FUNDAMENTALS 3

 41 The voltage of domestic supply is 220 V. This figure represents- r.m.s. value [other wrong options are – Mean value, Peak value, Average value, ]

 42 The shunt element of prototype high pass filter is Inductive [other wrong options are – Resistive, Capacitive, Combination of L and C, ]
 43 Which of the following statement is incorrect ? Current source is a passive element [other wrong options are – Resistance is a passive element, Voltage source is an active element, Conductance is a passive element, ]
 44 In a series resonant circuit, the impedance of the circuit is Minimum [other wrong options are – Maximum, Zero, Infinite, ]
 45 Ohm is the unit of all of the following except Capacitance [other wrong options are – Inductive reactance, Capacitive reactance, Resistance, ]
 46 Skin effect occurs when a conductor carries current at____ frequencies. High [other wrong options are – Very low, Low, Medium, ]
 47 The time constant of a series R-C circuit is given by RC [other wrong options are – R/C, RC2, R2C, ]
 48 The double energy transient occur in the R-L-C circuit [other wrong options are – Purely inductive circuit, R-L circuit, R-C circuit, ]
 49 In a series resonant circuit, the impedance of the circuit is Minimum [other wrong options are – Maximum, Zero, None of the above, ]
 50 Form factor for a sine wave is 1.11 [other wrong options are – 1.414, 0.707, 0.637, ]
 51 The r.m.s. value of a sine wave is 100A. Its peak value is 70.7 A [other wrong options are – 141.4A, 150A, 282.8 A, ]
 52 The power factor of incandescent bulb is Unity [other wrong options are – 0.8 lagging, 0.8 leading, Zero, ]
 53 The shunt element in a band pass filter is Parallel combination of L and C [other wrong options are – Capacitive, Inductive, Series combination of L and C, ]
 54 The ratio of the bandwidth to the resonance frequency is called the____ of the circuit. Selectivity [other wrong options are – Impedance, Susceptance, Quality factor, ]
 55 In A.C. circuit the power curve is a sine wave having Double the frequency of voltage [other wrong options are – Same frequency as that of voltage, Half the frequency of the voltage, None of these, ]
 56 The r.m.s. value of pure cosine function is 0.707 of peak value [other wrong options are – 0.5 of peak value, Same as peak value, Zero, ]
 57 At very low frequencies a series R-C circuit behaves as almost purely____ Capacitive [other wrong options are – Resistive, Inductive, None of these, ]
 58 In a R-L-C series circuit if voltage V across the circuit is reduced to half the current I will change to I/2 [other wrong options are – 2 I, 3/4 I, 5/8 I, ]
 59 In the R – L – C containing R = 4.5ω L = 0.06 H,C = 0.6 µF the power factor will be Leading [other wrong options are – Zero, Lagging, Unity, ]
 60 Capacitive reactance is more when  Capacitance’sis less and frequency of supply is less [other wrong options are – Capacitance is less and frequency of supply is more, Capacitance is more and frequency of supply is less, Capacitance is more and frequency of supply is more, ]