Distinguish with illustrations between free and forced oscillations. What is a resonance?

What is the phase difference between current and voltage at resonance ?

What is the phase difference between voltage and current in L-C-R circuit at resonance?

Locate the resonance angular frequency bar(omega_(0)) from the graph.

"Larger the value of Q, the smaller of the value of 2 Delta omega or the bandwith and sharper is the resonance". Describe.

A series L-C-R circuit connected to a variable frequency 230 V source has L = 5.0 H, C = 80 mu F, R = 40 Omega as shown in figure. (a) Determine the source frequency which drives the circuit in resonance. (b) Obtain the impendance of the circuit and amplitude of current at the resonant frequency. (c ) Determine the rms potential drops across the three elements of the circuit. Show that the potential drop across the L-C combination is xer at the resonating frequency.

In a series L - C - R circuit in which R = 3 Omega , L = 25 m H and C = 800 mu F a sinusoidal AC voltage of peak value 2250 V is applied. Find (a) the frequency at which resonance occurs. (b) the currnet in the circuit at resonant condition.

In a series LCR circuit in which R= 3Omega , L=25mH and C=800muF a sinusoidal a.c. voltage of peak value 250 V is applied. Find frequency at which resonance occurs

What is ferromagnetism? What are the ferromagnetic substance?

What is conductance? What is its unit?