A circuit consists of a source of a constant `emf xi` and a resistance `R` amd a capacitor with capacitance `C` connected in series. The internal resistance of the source is negligible. At a moment `t = 0` the capacitance of the capacitor is abruply decreased `eta`-fold. FInd the current flowing through the circuit as a function of time `t`.

A closed circuit consits of a source of constant and E and a choke coil of inductance L connected in series. The active resistance of the whole circuit is equal to R . At the moment t = 0 the choke coil inductance was decreased abrupty eta times. FInd the current in the circuit as a function of time t .

A closed circuit consists of a source of constant emf E and a choke coil of inductance L connected in series.The active resistance of the whole circuit is equal to R .It is in steady state.At the moment L=0 the choke coil inductance was decreased abruptly 4 times.The current in the circuit as a function of time t is E/R[1-xc^(-4tR//L)] .Find out value of x .

circuit consists of a source of EMF xi and internal resistance r, two capacitors each of capacitance C and two resistors, each of value R. The voltage across either capacitor is:

A capacitor of capacitance 20muF is connected in series with 25Omega resistance to 240 V, 50 Hz AC. The maximum current in the circuit is

An AC circuit consists of an inductor of inductance 0.5H and a capacitor of capacitance 8muF in series. The current in the circuit is maximum when the angular frequency of AC source is

A circuit consisting of a capacitor with capacitance C and a resistance R connected in series was connected at the moment t=0 to a source of ac voltage V=V_(m) cos omegat . Find the current in the circuit as a function of time t .

A circuit consists of a capacitor with capacitance C and a coil with active resistance R and inductance L connected in parallel. Find the impedane of the circuit at frequency omega of alternating voltage.