|MadSci Network: Physics|
We know that emf induced in a rod of length 'l' moving in a magnetic field of magnitude 'B' with speed 'v' perpendicular to field is given by E=v *b * l. But what this speed is with respect to? If 'v' is the speed measured from some frame then the induced emf becomes a frame dependent quantity. So of I connect a bulb to the terminals of rod(which will behave as a battery) then the will be seen glowing in one frame but will be seen off in another frame moving with the same speed as that of rod in its direction. If the answer is that 'in second frame the rod is at rest but the field is moving at the same speed v in opposite direction', then it introduces a concept of motion of field. Firstly, i m unaware of any such concept. Secondly, another question arises that will there be some added phenomenon if the field is observed from an accelerated frame (such as emission of some energy)
Re: is induced emf a frame dependent quantity
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