A solenoid with inductance `L=7 m H` and active resistance `R=44 Omega` is first connected to a source of direct voltage `V_(0)` and then to a source of sinusoidal voltage with effective value `V=V_(0)` . At what frequency of the oscillator will be power consumed by the solenoid be `eta=5.0 ` times less than in the former case ?

A coil of inductance 300mh and resistance 2Omega is connected to a source of voltage 2V . The current reaches half of its steady state value in

A coil with inductance L=0.70 H and active resistance r=20 Omega is connected in series with an inductance - free resistance R . An alternating voltage with effective value V=220 V and frequency omega=314 s^(-1) is a applied across the terminals of this circuit. At what value of the resistance R will the maximum heat power be generated in the circuit ? What is it equal to ?

A coil has inductance of 0.4 H and resistance of 8 Omega .It is connected to an AC source with peak emf 4V and frequency 30/pi Hz .The average power dissipated in the circuit is

A coil of inductance L = 300 mH and resitance R = 140 m Omega is connected to a constant voltage source. How soon will the coil current reach eta = 50 % of the steady-state value ?

A coil with active resistance R and inductance L was connected at the moment t=0 to a source of voltage V=V_(m)cos omegat. Find the current in the coil as a function of time t .

A battery having e.m.f. 5 V and internal resistance 0.5 Omega is connected with a resistance of 4.5 Omega then the voltage at the terminals of battery is

A coil of inductance 5.0 mH and negligible resistance is connected to an oscillator giving an output voltage E=(10V) sin omegat .Which of the following is correct