Fig. 214.—The Toepler-Holtz induction machine.
Important Topics
Static Electric Generators.—(a) plate friction machine, (b) electrophorus, (c) induction or influence machine.
Exercises
1. Potential is similar to what other terms that we have studied?
2. What three electrical phenomena are better understood from a study of the lines of force?
3. How many charges may be produced by an electrophorus before the plate needs to be electrified again? Explain.
4. The static induction machine is often called a "continuous electrophorous." Why?
5. The Leyden jars used with the induction machine cause much brighter sparks to be produced than without them. Explain.
6. With the Leyden jars removed, would the frequency with which the sparks pass between the knobs be increased or decreased? Explain.