Alternating Cur...

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

The readings of ammeter and voltmeter in the following circuit are respectively

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

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

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

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

In the circuit shown in figure neglecting source resistance the voltmeter and ammeter reading will respectively be

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

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

A resistance R, inductance L and capacitor C are connected in series to an oscillator of frequency f. If resonant frequency is f_rthen current will lag thevoltage when