# Homework Help: The laws of Electromagnetic Induction

1. Apr 4, 2007

### natural

Aim: to test the Faraday relationship: induced e.m.f. equals the rate of change of magnetic flux linkage

N=number of turns in coil
B=magnetic flux density
A=area of the coil

To investigate the relationship above first i must have two quantities constant while the thired is varied.

from what i understand i should keep t constant and vary the rest and plot e.m.f vs N
then keep N constant and vary the rest and plot e.m.f vs I both of these graphs i think should give a staight line.

apparatus used would be: pair of solenoids of square cross-section; one has twice the area of the other
signal generator: use the low impedance output and set the frequency on the 100 Hz to 1000Hz range.
Cathode ray oscilloscope for measuring the peak induced voltage.

e.m.f= NA dB/dt
but dB/dt is porportinal to I and I is proportional to f
therefore e.m.f = NAf

i'm lost up to this point if i do all of this, what can i conclude anout the Faraday relationship.what other readings must i take etc.. please help

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