question based on Kirchoff's laws A cell supplies a current i1 through a coil of resistance R1,a current i2 through a coil of resistance R2.What is the e.m.f. and the resistance of the cell in terms of i1,i2,R1 and R2 ?
I guess this means the resistors are in parallel.So using ,Kirchoff's(hope I spelt it right) 2nd law,
E = (i1+i2)r + i1*R1
E = (i1+i2)r + i2*R2
(r is the internal resistance. E is the emf of the cell)
After equating the 2 equations,I get i1= (i2*R2)/R1
but I can't seem to get an expression for the emf without including 'r' in it.And when I tried to get an expression for r ,I end up including E in it.
Looking for some help here,
Thank you
