11how do we decide the polarities?
46 Answers
11might be a stupid question but how you replaced the loop by a straight conductor
1hmm......
see...
for smaller ring,
force on the electrons = q.[-2vi^ x Bk^] = 2qvB j^
for bigger ring,
force on the electrons = q.[vi^xBk^] = qvB -j^
direction of movement of e- = direction of force on e-
= opposite to the direction of current flow.
11another stupid doubt
how the pot difference is between the top and bottom points?
1where top and bottom ??
one has emf= 4rvB
another has = -4rvB
so net is 8rvB.
11in a single ring
by top and bottom i meant why the upper point is at 4rvB and the lower at 0
1yep it IS important :)
promoted to sun ?? [3]
bad promotion [3]
sky is bigger than sun........ [3]
11maybe a bit too philosphical:
but size doesnt determine everything
sun provides light and heat required for life while sky is rather useless
11hey cheer up i dint say you :) i was talking of the original sky [3]
thats why you were promoted [3]
1does potential diff depend on their velocities?????
srry if am askin stupidly........
1srryy srry... theres a uniform mag field.. forgot dat...