Grade 12Algebra
i have no idea what is given and how it can solve. help any iitians
i have no idea what is given and how it can solve.
help any iitians
1 Answer
Apoorv Tiwari
according to the given problem
del(R)/ (R).del(theta) = del( Rf + Rc) / ( Rf + Rc). del(theta) = 0 i.e. del(RF) + del(RC) = 0
or, (Rf af + RC ac)del(theta) = 0
so,
Rf / Rc = ac / af = – 7.4 * 10^4 / 5*10^-3 = 3/20
but as R = p(l/S) and S is same
pf lf / pclc = 3/20 => lf / lc = 3/20* (3*10^-5)/(1*10^-7) = 45
also the disc re in series i.e current is same
==> Hf /Hf = Rc /Rc = 3/20
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