404 



ELECTRICAL MEASUREMENTS 



tector at any time if the potentials of these two points rise at 

 the same rate. 



To determine the condition necessary for a balance, suppose 

 the steady current balance has been attained and that r has been 

 adjusted so that the bridge is also balanced for variable currents. 



FIG. 235. Diagram for Anderson bridge. 



Referring to Fig. 235, by supposition, 

 P RM p 



Kx = TT~ &P 



&N 



i Q = continuously 



^c = 

 From the mesh 6, c, d, e, 



Lx^ = irT + < 



di M 



.D. a6 = P.D. ae = iM^^ = ^ I , 



' dt R M C 

 From (A), (B) and (C), 



(A) 



(B) 



(C) 

 (D) 



From the mesh a, b, e, d, 



