The 4.90 A current through a 1.50 H inductor is dissipated by a 1.90 a resistor in a circuit like that in the figure below with the switch in position 2. 0.6321, 0.368/, O r- LR 2r 3r 4r O r= LR 2r 3r 4: (b) (c) (a) What is the initial energy (in ) in the inductor? (b) How long will it take (in s) the current to decline to 5.00% of its initial value? (c) Calculate the average power (in W) dissipated, and compare it with the initial power dissipated by the resistor. (ratio of initial power to average power)

Inductors in series. Two inductors L1 = 1.13 H and L2 = 2.01 H are connected in series and are separated by a large distance so that the magnetic field of one cannot affect the other. (a) Calculate the equivalent inductance. (Hint: Review the derivations for resistors in series and capacitors in series.Which is similar here?) (b) What is the generalization of (a) for N = 13 similar inductors L = 3.02 H in series? (a) Number i 0.72334 Units H (b) Number i 0.2323 Units H

An electromagnet can be modeled as an inductor in series with a resistor. Consider a large electromagnet of inductance L = 12.5 H and resistance R = 7.50 connected to a 18.0-V battery and switch as in the figure shown below. After the switch is closed, find the following. S E + 'I R (a) the maximum current carried by the electromagnet A (b) the time constant of the circuit S (c) the time it takes the current to reach 95.0% of its maximum value S

MY NOTES Find the magnetic energy stored by a 5.22 mH inductor when the current through it is 11.1 A.

A 24-V battery is connected in series with a resistor and an inductor, with R = 6.8 Ω and L = 5.4 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value. J(b) Find the energy stored in the inductor one time constant after the switch is closed. J

After being closed for a long time, the switch S in the circuit shown in the figure below is thrown open at t = 0. In the circuit, & = 24.0 V, RA= 3.70 KM, Rß = 7.50 kỵ, and L = 665 mH. RA ww S mo L +1 b ww RB (a) What is the emf across the inductor immediately after the switch is opened? V (b) When does the current in the resistor RÅ have a magnitude of 1.00 mA? S

A battery providing emf V is connected in series to a resistor R and an inductor L, and left until the current reaches a constant value. (a) What is the energy stored in the inductor in terms of V, R and L? Then, at t = 0, the battery is suddenly removed, so that only the inductor and resistor are left connected to each other in a closed circuit. (b) Derive an expression for the energy stored in the inductor in the new circuit without the battery. Sketch your expression as a function of time. (c) How long does it take for the energy stored in the inductor to decay to 1/9 of the initial value that you found in part (a)?

Two coils are placed close together in a physics lab to demonstrate Faraday's law of induction. A current of 4.90 A in one is switched off in 1.40 ms, inducing a 7.90 V emf in the other. What is their mutual inductance?

An inductor (L = 0.39 H) and two resistors (R, = R, = 5.5 N) are connected to a battery with an emf of 12.0 V as shown in the figure below. 12.0 V R1 S R2 (a) If the switch S is closed at time t = 0, determine the potential drop across the inductor at time t = 0.045 s. (Enter the magnitude.) V (b) After a steady state is reached, the switch is opened. What are the direction and magnitude of the current through R, at a time 0.045 s after the switch is opened?

A 5 H inductor carries a current of 2 amps. How can a self-induced EMF of 50 volts be made to appear across the inductor? Change the current to 10 A. Change the current uniformly to zero in 20 seconds. Break the circuit instantaneously. Change the current at the rate of 10 A/s None of these