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Grade: 12
        
i have no idea what is given and how it can solve. 
help any iitians
29 days ago

Answers : (1)

Apoorv Tiwari
29 Points
							
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,   (Raf  + Rac)del(theta) = 0
 
so
R/ Rc =  a/ af  = – 7.4 * 10^4 / 5*10^-3  = 3/20
 
but as R = p(l/S) and S is same
      pl / 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 
      ==> H/H = R/Rc = 3/20
15 days ago
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