Physics 21Fall 2007Solution to HW-18YF 30-27 (Modified)An inductor with an inductance of 2.80 H and a resistance 7.50 Ωis connected to the terminals of a battery with emf of 6.20 V and negligible internal resistance. (A) What is the power in-put to the inductor from the battery as a function of time tin seconds if the circuit is completed at t= 0? (B) What is the rate of dissipation of energy in the resistance of the inductor as a function of time tin seconds? (C) What is the rate at which the energy of the magnetic field in the inductor increases as a function of time tin seconds?30-28A 21.0 μF capacitor is charged by a 135.0 V power supply, then disconnected from the power and connected in series with a 0.270 mH inductor. (A) Calculate the oscillation frequency of the circuit. (B) Calculate the energy stored in the capacitor at time t= 0 (the moment of connection with the inductor). (C) Calculate the energy stored in the inductor at t= 1.30 ms.
This is the end of the preview.
access the rest of the document.
Magnetic Field, power supply, LRC, oscillation frequency, parallel-plate air-filled capacitor