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Study Guide – Chapter 16 Test Name: ________________________________ Date: __________ Period: _______________ 1. When atoms have an imbalance of protons and electrons, there will be a(n) _____________________________. 2. _____________________________ is the measure of voltage flow. 3. If a circuit is _____________________________ it means that electrons cannot flow through it. 4. A(n) _____________________________ is a source of potential difference (check 16.2 notes). 5. What is a typical dry cell battery made of: _________________________________________________________________. 6. A(n) _____________________________ is an attractive or repulsive force caused by a charged object. 7. A(n) _____________________________ circuit is a single pathway for current to flow. 8. Resistance is measured in _______________________ and the symbol for this unit is _____________________. 9. Larger wires usually flow more current decreasing the amount of _____________________________. 10. A(n) _____________________________ is a material that allows a charge to move through it. 11. List two examples of an insulator _________________________________________________________. 12. If you shuffle across a carpeted room on a dry day, you would transfer electrons from the carpet to your body. Is this an example of a charge by contact OR a charge by friction? 13. If a circuit is _____________________________ it means electrons can flow through it. 14. Charges flow from ____________________________ areas to _____________________________ areas. 15. If an atom has an excess of protons, it will have a _____________________________ charge. 16. You shuffle across a carpeted room and build up a static charge. Then you touch your best friend on the arm and shock him/her. Shocking your friend is an example of a charge by contact OR charge by friction? 17. Excess electrons = a ____________________________ charge. 18. A(n) _____________________________ consists of two plates made of different types of _________________________ in a ____________________________ solution. 19. A(n) ____________________________ circuit has only a single pathway for current to flow. 20. A(n) _________________________ diagram is a graphical representation of a circuit. 21. Draw the symbol for the following: a. open switch - _____________________________ b. closed switch - _____________________________ c. wire(s) - _____________________________ d. light bulb or lamp - _____________________________ e. resistor - _____________________________ f. battery - _____________________________ 22. An example of a(n) _____________________________ circuit is when two or more devices are connected to a circuit and the voltage is the same across each device. 23. _____________________________ is not a very good conductor so it is used as the filament in incandescent light bulbs. 24. A(n) _____________________________ is a substance that does now allow a charge to move through it. Problems: Be sure to study and rework the problems we did in class (notebook #6). Formulas: Ohm’s Law Power Energy V P E I R I V P t (V) Voltage: Units – Volts, V (P) Power: Units – Watts, W (E) Energy: Units – kW-h (I) Current: Units – Amps, A (I) Current: Units – Amps, A (P) Power: Units – Kilowatts, kW (R) Resistance: Units – ohms, (V) Voltage: Units – Volts, V (t) Time: Units – hours, h