ONLINE ELECTRICAL ENGINEERING will contain ELECTRICAL ENGINEERING QUESTIONS & ANSWERS,ELECTRICAL INTERVIEW QUESTION & ANSWERS and important topics from ELECTRICAL MACHINES, POWER SYSTEMS ,POWER ELECTRONICS AND DRIVES and other ELECTRICAL ENGINEERING SUBJECTS.Objective tests will be conducted periodically which would be useful for exams like POWERGRID , NTPC ,NHPC ,ENGINEERING SERVICES ,IES ,ETC..FEEL FREE TO ASK YOUR DOUBTS REGARDING ELECTRICAL SUBJECTS.
Saturday, May 8, 2010
BASIC ELECTROMAGNETIC LAWS
It states that "If a conductor of length 'l' is moved with a velocity 'v' in a magnetic field of constant flux density 'B', then the EMF induced is equal to the rate of change of flux."
where, E = Induced EMF (Volts)
B = Flux density (Wb/m^2)
l = length of the conductor (m)
v = velocity of the conductor (m/s)
It states that "If the fingers of the right hand are placed around the wire such that the thumb points in the direction of current flow, the fingers will be pointing in the direction of the magnetic field produced by the wire."