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A metal disc is placed in a uniform magnetic field of flux density,B,acting through the plane of the disc at and angle,[itex]\theta[/itex].When the dis is rotated an e.m.f. is induced between the centre and the rim of the disc.
http://img158.imageshack.us/my.php?image=scanlc2.jpg
Design an experiment to investigate how the induced e.m.f.,E, depends upon [itex]\theta[/itex]
ok, since I am I need to measure E and [itex]\theta[/itex], I need to keep the rest constant.
[itex]\omega[/itex] would be kept constant by using a motor with a constant power output to rotate the disc.
To keep B constant, use a solenoid and the field should be uniform through the centre of it. (Not sure about that)
But I do not know how to go about measuring the angle.[itex]\theta[/itex]
http://img158.imageshack.us/my.php?image=scanlc2.jpg
Design an experiment to investigate how the induced e.m.f.,E, depends upon [itex]\theta[/itex]
ok, since I am I need to measure E and [itex]\theta[/itex], I need to keep the rest constant.
[itex]\omega[/itex] would be kept constant by using a motor with a constant power output to rotate the disc.
To keep B constant, use a solenoid and the field should be uniform through the centre of it. (Not sure about that)
But I do not know how to go about measuring the angle.[itex]\theta[/itex]