F. H. Richardson's bluebook of projection (1935)

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CHARACTERISTICS OF ALTERNATING CURRENT Theory of the Electrical Condenser, page 465 r 1. Does any current at all flow through an open switch in a d.c. circuit? In an a.c. circuit? vJ2*/ Explain why a small amount of current flows in the wires of an a.c. circuit even when the switch is open. 3. What is the effect, upon this weak current flow, of moving the switch blades closer to the contacts connected with the other side of the line? Construction of the Electrical Condenser, page 466 4. Describe an electrical condenser, and explain its action in an a.c. circuit. 5. Describe the construction of an electrolytic condenser. 6. Can it be used in an a.c. line? , rf • The Induction Coil, page 467 ■ 7. Describe an induction coil. 8. Describe a retard coil. 9. Describe the action of an induction coil in a d.c. circuit. In an a.c. circuit. ,J : . ■ /£ ^ Ohm's Law for Alternating Current, page 468 10. Does the formula of Ohm's Law for d.c. also apply to a.c? Why not? 1 1 . What is reactance ? I (/3) 12. What is impedance ? 13. Give the formula of Ohm's Law for a.c. 14. Explain the difference between this and the d.c. formula, and the reason therefore. « 464 f < M i <*¥ *