A solenoid with inductance `L=7 m H` and active resistance `R=44 Omega` is first connected to a source of direct voltabe `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 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 resistance 8Omega and self -inductance 19.1 mH is connected with an ac source of peak voltage 200 V and frequency 50 Hz

A coil having self-inductance of 0.7 H and resistance of 165 Omega is connected to an a.c. source of 275 V, 50 Hz. If pi = 22/7 Calculate : Reactance of the coil

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 capacitor with capacitance C = 400 pF is connected via a resistance R = 650 Omega to a source of voltage V_(0) . How soon will the voltage developed across the capacitor reach a value V = 0.90 V_(0) ?

In an L-R circuit, an inductance of 0.1 H and a resistance of 1 Omega are connected in series with an ac source of voltage V = 5 sin 10 t. The phase difference between the current and applied voltage will be

In an L-R circuit, an inductance of 0.1 H and a resistance of 1 Omega are connected in series with an ac source of voltage V = 5 sin 10 t. The phase difference between the current and applied voltage will be

A coil of inductance 0.2 H and 1.0 W resistance is connected to a 90 V source. At what rate will the current in the coil grow at the instant the coil is connected to the source?