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
Refer to the circuit shown below containing a two-port network. The two-port is a transconductance amplifier. The input port of the two-port is defined by terminals A and B. T

Merits: The circuit has the trend to stabilize operating point against changes in temperature and β-value. Demerits: In this type of circuit, to keep I C  independent o


For a 50kW three phase rectifier connected at 415 V to a point of common coupling with a short circuit capacity 500kVA modelled as an inductive source, design filters to make the s

Explain the Power Transmission Lines Transmission and distribution of electric power is accomplished by using overhead lines or underground cables. Overhead lines are normally

How to calculate Electrical losses by transformation

Hysteresis results in a dissipation of energy Hysteresis results in a dissipation of energy which appears as a heating of the magnetic material. The energy loss associated wit

how to ca;lculte star point potential

Ask question (c) Reduce each of the given signal transmission situations to a source, coupling path(s), and receptor: (i) AM radio transmission to the human ear. (ii) TV transmis

Guarding Against Loss in Transformers Distribution transformers are expected to convert up to 95-98% of the input power into usable output power. A distribution transformers i