In a series LCR circuit connected to an ac source of voltage `v=v_msinomegat`, use phasor diagram to derive an expression for the current in the circuit. Hence obtain the expression for the power dissipated in the circuit.Show that power dissipated at resonance is maximum.

If the emf of an ac circuit be E=E_0 sinomegatand current I=I_("cosomegat") , what is the power dissipated in the circuit?

Show that in a.c. circuit the, average power dissipated per cycle in a pure inductor is zero.

In an ac circuit voltage V = 100 sin(100t) V and current I = 100 sin(100t) mA . The power dissipated in the circuit over a full cycle is—

A series LCR circuit is connected to a variable frequency 230 V source , L=5.0 H, C=80muF,R=40Omega Determine the source frequency for which resonance occurs in the circuit.

In L.C.R. series a.c. circuit, the phase angle between current and voltage is—

A 220V, 50Hz ac source is connected to an inductance of 0.2H and a resistance of 20Omega in series . What is the current in the circuit?

In a series LCR circuit R= 25Omega ,L=10 mH and C=1muF . The circuit is connected with an ac source of varible frequency . What is the Q-factor of the circuit?

A device X is connected across an ac source of voltage V=V_0sinomegat . The current through X is given as I=I_0sin(omegat+pi/2) . Draw the phasor diagram for the device X.

60muF capacitor to a 110 V, 60 Hz ac supply. Determine the rms value of the current in the circuit. What is the net power absorbed by the circuit over a complete cycle?

An ac source is connected in series with an inductor of 5H and a resistor of 1000Omega . The rms value of voltage of the source is 100 V and the frequency of the source is 50cps. What is the rms value of the current in the circuit? What is the phase difference of the voltage and the current in the circuit? What is the power dissipated in the circuit?