a coil is being rotated at a frequency of 50Hz in a magnetic field of field density B, what is the average emf induced and maximum emf induce? Area = a and number of turns = N.
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Just quoting in Puddles the Monkey so she can move the thread if needed
a coil is being rotated at a frequency of 50Hz in a magnetic field of field density B, what is the average emf induced and maximum emf induce? Area = a and number of turns = N.
What issues do you have with this problem?
Are you able to show me an attempt at the question?
but i thought the current coming from mains supply is created from alternating pd
The problem you're describing sounds very similar to an alternator (used in cars). The emf varies sinusoidally and you get an alternating current that also varies sinusoidally in magnitude and direction.
The problem you're describing sounds very similar to an alternator (used in cars). The emf varies sinusoidally and you get an alternating current that also varies sinusoidally in magnitude and direction.
so i was describing a different concept? If so lets forget about it. Also can i ask you a question regarding electric fields?
so i was describing a different concept? If so lets forget about it. Also can i ask you a question regarding electric fields?
It sounds like you were possibly trying to describe a direct-current generator that produces emf of the same sign (e.g. no negative values). The DC generators used commercially have lots of coils and commutator segments which smooth out the bumps in emf so that your terminal voltage is one directional and pretty much constant.
For a problem involving a dc generator, you can calculage average back emf.
It sounds like you were trying to describe a direct-current generator that produces emf of the same sign (e.g. no negative values). The DC generators used commercially have lots of coils and commutator segments which smooth out the bumps in emf so that your terminal voltage is one directional and pretty much constant.
For a problem involving a dc generator, you can calculage average back emf.
Sure, ask away
so i have 2 positive charges if they are separated by a distance d what will the electric field strength at the mid point be? Would i just add the electric field strength for each charge at a distance d/2?
If i had unlike charges would i still have to add the electric field strength? a if i had 2 negative charges i would have to find the net electric field strength right?
so i have 2 positive charges if they are separated by a distance d what will the electric field strength at the mid point be? Would i just add the electric field strength for each charge at a distance d/2?
Yes. This is known as the superposition of Electric Fields and you use it a lot when dealing with distributions of point charges.