International Library of Technology · Scranton, International Textbook Co. · leaf 308
es repel each other andthose carrying unlike charges attract each other. Fig. 19shows the construction of the Stanley electrostatic volt-meter. £, B and C, C are fixed plates mounted on a hard-rubber base. These plates are covered with a hard-rubbercovering H to prevent the charge from leaking off,… … Fig. 19. spiral spring S. The fixed plates B, B and the movablevane A are connected together and form one pole of theinstrument. The fixed plates C, C are connected togetherand form the other pole. When the voltmeter is connected §17 ELECTRIC LIGHTING. 17 to the circuit, B and A being charged alike…
Electrical engineering
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