112 



Experimental Switchboards and Experimental Resistances. 



Network Terminals 



Current Regulator with 

 Double Switch Contact 



v 



Network Voltage V 



W 

 o 

 ST 





3 

 s 

 i i. 



<rf- 

 N 



O 

 S 



Switch for Shunt 



Scheme II. 



other hand, the battery of 6 cells has a charging current of only 3 amps., then at 110 volts pressure 



98 ^08 



- = 32.6 ohms, and at 220 volts - = 69.3 ohms will be necessary, and the resistance of 48 ohms 



o o 



of Type B and on 24 ohms of the Type C will not be sufficient. From what has been said it will 

 be seen that when the resistance of the apparatus in circuit is low, and with small currents, the No. I 

 Connections can no longer be utilised. In these cases recourse is had to No. II scheme. 



Method II. Rheostat as a Shunt Resistance for Division of Tension. 



The connections are the same as the preceding, only the switch for the shunt is closed. 



Switch Contact I is on the last contact to the right and Switch Contact II on another contact. The 

 current, starting at + follows the course shown in the illustration by lines and arrows: 



D | 9,10, 11,12, Expt. Apparatus, 13, 14, Lever II I , . 

 + ,1,2 ..... 8 I ~~24 25 "15 ( ^^SwitchContactljlSjlQ ..... 23,. 



Cl. 5167. 



