distance between coil (2 Viewers)

[clever angel]

hi

this is related to the prac in motors and generators

ok, so the as the distance between the coild and magnet increases the magntiude of the induced emf icnreases but why????

ne formulas

thankxx in advance

 

[mattchan]

Well, its all related to magnetic flux. Remembering that whenever there is relative motion between a coil and a magnet, it results in a change in flux which induces an emf.

So, as more of the moving magnetic field lines cut through the coil, a large emf will be induced. So as you move the magnet closer to the coil, more field lines are cutting the coil (because magnetic field lines are closer near the poles).

Cheers

 

[sikeveo]

err isnt it supposed to be the closer the magnet is to the coil, the greater the magnitude of the induced emf?

 

[exa_boi87]

err isnt it supposed to be the closer the magnet is to the coil, the greater the magnitude of the induced emf?

Yep, as far as I know thats the logical way of it working .. my guess is a typo

 

[mattchan]

err isnt it supposed to be the closer the magnet is to the coil, the greater the magnitude of the induced emf?

Thats what i said, more field lines cut the coil as the magnet moves closer to the coil, thus larger change in flux and larger induced emf

 

[exa_boi87]

Yep, in agreeance, was referring to the initial post .. shouldve made that clearer

 

[sikeveo]

Yeh i was talking about the OP (original post).