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Alternating Current Test - 54
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Alternating Current Test - 54
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  • Question 1/10
    4 / -1
    In an LR–circuit, the inductive reactance is equal to the resistance R of the circuit. An e.m.f. E = E0 cos (ωt) is applied to the circuit. The power consumed in the circuit is
    Solutions

  • Question 2/10
    4 / -1
    The readings of ammeter and voltmeter in the following circuit are respectively

  • Question 3/10
    4 / -1
    In a series circuit C = 2 μF, L =1 mH and R = 10 Ω. When the current in the circuit is maximum, at that time the ratio of the energies stored in the capacitor and the inductor will be
    Solutions

  • Question 4/10
    4 / -1
    An alternating e.m.f. of angular frequency co is applied across an inductance. The instantaneous power developed in the circuit has an angular frequency
    Solutions

  • Question 5/10
    4 / -1
    The voltage of an ac source varies with time according to the equation V = 100 sin 100 πt cos 100 πt, where tis in seconds and V is in volts. Then
    Solutions

  • Question 6/10
    4 / -1
    The diagram shows a capacitor C and a resistor R connected in series to an ac source. V1 and V2 are voltmeters and A is an ammeter
    Consider the following statements
    I. Reading in A and V2 are always in phase
    II. Reading in V1 is ahead in phase with reading in V2
    III. Reading in A and V1 are always in phase. Which of these statements are/is correct

    Solutions

  • Question 7/10
    4 / -1
    In the circuit shown in figure neglecting source resistance the voltmeter and ammeter reading will respectively be

    Solutions

  • Question 8/10
    4 / -1
    The voltage of an ac supply varies with time (t) as V = 120 sin 100 πt cos 100 πt. The maximum voltage and frequency respectively are
    Solutions

  • Question 9/10
    4 / -1
    A telephone wire of length 200 km has a capacitance of 0.014 μF per km. If it carries an ac of frequency 5 kHz, what should be the value of an inductor required to be connected in series, so that the impedance of the circuit is minimum
    Solutions

  • Question 10/10
    4 / -1
    A resistance R, inductance L and capacitor C are connected in series to an oscillator of frequency f. If resonant frequency is frthen current will lag thevoltage when
    Solutions

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