olts, thenumber of units of energy must still be 1000, hence thenumber of amperes would be 10. The Ruhmkorff coil (Fig. 126) as described changesa current of low potential to one of high potential, and is called a ^/<f/-///transformer. Ifa coil of fine wirebe used as the pri-mary, the current… … Electro-Dynamics. 155 tial of the main circuit to the safe Hmit of about 100 volts.By the use of transformers many hundreds or even thou-sands of amperes may be obtained for metal fusing andthe like. Questions for Review. — i. What is static electricity ? 2. What is electrical potential? 3. What is…
Physics
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