INDUCTANCE AND CAPACITY 



407 



with alternating currents and that its equivalent capacity is 

 C, and its equivalent conductance is ^-, then 



Rd 



-* C i I 



1 + JJ 



Substituting this value in (38), 

 RAtRcRp 



r> 



R 







rp 



RcR N (R x 



The horizontal component gives 



R, 





RxRn -~ RiuRp = -p~ 

 The vertical component gives 



L*D /*1 I A /I I I I 7D I 



x = KM^ \f\*- ~r ljr~l T ^P 



That is, the energy loss does not complicate the measurement of 

 the inductance. 



FIG. 237. 



Stroude and Gates arrangement Anderson bridge, Fig. 236 redrawn, 



of the Anderson bridge. 



Stroude and Gates 22 modified the Anderson bridge by inter- 

 changing the source of current and the detector. 



The advantage of the rearrangement is that when the con- 

 ditions are such that r is high, it is possible to increase the applied 

 voltage and thus maintain the sensitivity of the bridge by keeping 

 the bridge current at a high value. 



As the only alteration has been to interchange the source of 

 current and the detector, the formula connecting the self- 

 inductance and the capacity is the same as for the Anderson 

 bridge. 



