Energy stored in a magnetic field , Electrical Engineering

Energy stored in a magnetic field

Consider a circuit consisting of a voltage supply,  switch,  resistor  and  a  coil  of  N turns wound on a toroid of length l, all in series.

 

208_Energy stored in magnetic field.png

With the switch open, no current flows inthe coil and therefore there is no flux produced in the core of the coil.

 

1326_Energy stored in magnetic field 1.png

 

At t=0, the switch is closed and the current builds up with time. It is not instantaneous,because the coil produces a back emf that limits the rate of rise of current

 

 

2133_Energy stored in magnetic field 3.png

 

where v = the time dependent back emf created by the coil. The instantaneous power being delivered
by the supply at time t is

vs .i=i2 R+v.i

 

986_Energy stored in magnetic field 4.png

237_Energy stored in magnetic field 5.png

 

Posted Date: 8/22/2012 6:48:23 AM | Location : United States







Related Discussions:- Energy stored in a magnetic field , Assignment Help, Ask Question on Energy stored in a magnetic field , Get Answer, Expert's Help, Energy stored in a magnetic field Discussions

Write discussion on Energy stored in a magnetic field
Your posts are moderated
Related Questions
Q. Using a minimum number of NAND gates, realize the following Boolean expression: F(A,B,C) = ∑ mi (0, 3, 4, 5, 7).

Q. Explain Power-System Loads? Figure represents a one-line (single-line) diagram of a part of a typical three-phase power system. Notice the symbols that are used for generato

Systemic Requirements: A robust GIS solution for a distribution utility comprises the subsequent: GIS application and database software should be OGC (Open Geospatial

Diffusion Capacitance Diffusion capacitance is the capacitance because of transport of charge carriers among the two terminals of a device, for instance, the diffusion of carr

1. The circuit shown below is a DC charging and discharging circuit. a. At t = 0 sec, switch S1 is thrown to position 1 ("pos1"). Write the mathematical expressions for V

Q. Interpretation and analysis using remote sensing? Interpretation and analysis using remote sensing Various characteristics of a river can be understood by studying its planf


Q. Explain about Synchronous machines? Large ac power networks operating at a constant frequency of 60 Hz in the United States (50 Hz in Europe) rely almost exclusively on sync

Customer Satisfaction - Issues of Power Supply Customer satisfaction measurement is a systematic process for collecting customer data (e.g. surveys, audits and etc.), analyzin