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Across 5. a variable resistor 7. an important quantity that determines the current in the circuit 10. the energy transferred to a circuit component pr unit charge 13. the tendency of a wire to resist the passage of electric current 14. the proportionality constant 15. is a material which contains movable electric charges 17. consist of the electrical outlets 18. an indispensable part of out lives 19. are the common voltage source in the laboratory 20. connects all lighting fixtures

Down 1. the energy transferred to one coulomb of charge within the battery 2. produce direct current 3. is made up of electrons flowing in one direction 4. two wires leading to the house 6. a substance that resists electric current 8. changes in direction 9. measures current 11. measures in amperes using an ammeter 12. is a device used to measure potential difference 16. is any arrangement of materials that provides a path of electrons to flow.