Objective Question Papers
Chapter 7: ALTERNATING CURRENT
Que 1:Alternating voltage (V) is represented by the equation
Que 2:In the case of an inductor
Que 3:In a pure capacitive circuit if the frequency of ac source is doubled, then its capacitive reactance will be
Que 4:In an alternating current circuit consisting of elements in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit?
Que 5:In which of the following circuits the maximum power dissipation is observed?
Que 6:In a series LCR circuit the voltage across an inductor, capacitor and resistor are 20 V, 20 V and 40 V respectively. The phase difference between the applied voltage and the current in the circuit is
Que 7:At resonance frequency the impedance in series LCR circuit is
Que 8:At resonant frequency the current amplitude in series LCR circuit is
Que 9:Quality factor and power factor both have the dimensions of
Que 10:A transformer works on the principle of
Que 11:For an ideal-step-down transformer, the quantity which is constant for both the coils is
Que 12:What is the frequency of the AC Mains in India?
Que 13:An alternating current can be produced by
Que 14:Which of the following can measure an alternating current?
Que 15:Which of the following circuits exhibits maximum power dissipation?
Que 16:What happens to the inductive reactance when the frequency of the AC supply is increased?
Que 17:What happens to the quality factor of an LCR circuit if the resistance is increased?
Que 18:Which of the following statements is true about the LCR circuit connected to an AC source at resonance?
Que 19:When is the current in a circuit wattless?
Que 20:The power factor is one for which of the following?
