Electricity Chapter 13 Past Paper PDF

# Review 14.2 ## Electricity Chapter 13 ### Note: Potential Difference 1. What is meant by the term "voltage"? Voltage is defined as the difference in electric potential energy per unit charge measured at two points. 2. What is the unit and symbol for voltage? Unit: V Symbol: V 3. How is voltage m...

# Review 14.2 ## Electricity Chapter 13 ### Note: Potential Difference 1. What is meant by the term "voltage"? Voltage is defined as the difference in electric potential energy per unit charge measured at two points. 2. What is the unit and symbol for voltage? Unit: V Symbol: V 3. How is voltage measured? 4. How is a voltmeter hooked up in a circuit? ### Note: Resistance in Circuits 5. What is meant by the term "resistance"? 6. What is the unit and symbol for resistance? Unit: Symbol: 7. How is resistance measured? 8. What is meant by "variable resistor"? ### Note: Current, Voltage and Resistance 9. What is Ohm's Law? 10. What does resistance equal? (In terms of voltage and current) 11. What does current equal? (In terms of voltage and resistance) 12. What is the current through an electric baseboard heater with a resistance of 38 ohms when the potential difference across it is 240 V? # Series vs Parallel Circuits 13. What is the difference between series and parallel circuits? 14. If one bulb burns out in a series circuit, what happens to the other bulbs? 15. If one bulb burns out in a parallel circuit, what happens to the other bulbs? 16. Do you expect the current to be the same in any part of a parallel circuit? Explain your answer. 17. What can you say about the current measured anywhere in a series circuit? 18. A series circuit has three identical lamps. The voltage at the battery is 30 V. What is the voltage on each lamp? 19. A parallel circuit has three identical lamps. The voltage at the battery is 30 V. What is the voltage on each lamp? ### Note: Practical Wiring 20. How are most circuits in your residence hooked up (series or parallel)? 21. Why are larger diameter cables used when supplying electricity to your residence? ### Note: Safety 22. Which appliances typically use 240 V? (Name two) 23. What are grounding pins used for? 24. Why is a GFI outlet used a lot in bathrooms? # Electricity Ch.13 ## Crossword ### Across 3. A **ground** pin is found on many plugs and is used for added safety. 5. As bulbs are added in a series circuit, they get dimmer and **dimmer** 8. This type of meter measures **resistance.** 10. A **battery** is made up of two or more cells. 13. As wires get hotter, the **resistance** of the wire increases. 18. Electrical **current** is the rate of electron flow past a specific point in a circuit. 19. The unit for voltage. **Volt** 20. GFI outlet: **Ground** 21. A circuit with no electrical load is called a **open** circuit. 22. A type of circuit where electrons flow in more than one path. **Parallel** 25. A type of circuit where electrons only follow one path. **Series** 26. If too much current flows through a wire, the wire can get **hot**. 27. These substances are the best conductor of electricity. **Metals** ### Down 1. This type of meter measures **voltage.** 2. The unit for electrical resistance. **Ohm** 4. A circuit **breaker** makes sure that the current doesn't get too high. 6. This type of meter measures **current**. 7. Voltage is also called electrical **potential**. 9. The basic particle of electricity. **Electron** 11. The "let-go **current**" is the amount of current where you can't let go anymore. 12. A device that can allow electrons to stop flowing, then flowing again. **Switch** 14. A **circuit** diagram is a technical name for a circuit diagram. 15. A device that makes sure that the current doesn't get too high. **Fuse** 16. A certain amount of current passing through your chest can stop your **heart**. 17. There is always a voltage **drop** across a load or energy source. 18. A dimmer switch is a type of **variable** resistor. 23. As you increase the **diameter** of a wire, the resistance increases. 24. The unit for electrical current. **Ampere** # Electricity (#2) ## Crossword ### Across 2. **Source** is what supplies energy to a circuit (a battery, generator, etc). 6. A type of current where electrons flow in one direction. **Direct** 7. Static **electricity** can build up on the surface of objects. 10. What the "A" in AC current stands for **Alternating**. 13. Secondary **cells** can be recharged and reused many times. 14. Another word for "Heat". **Thermal** 16. This kind of cell where a continuous supply of chemicals is pumped as it operates. **Flow-through** 17. The rate at which electrical energy is produced or consumed in a given time. **Power** 18. **Direct** electricity flows through controlled paths. 19. A type of energy where useful energy can be extracted from under the ground. **Geothermal** 20. A **closed** circuit is when the switch (power) is on. ### Down 1. These labels tell consumers how much power and appliance might use in a year. **Energy** 3. A continuous path for electron flow is an electric **circuit**. 4. A device that transforms electrical energy into other forms of energy. **Transformer** 5. These types of cells cannot be recharged. **Primary** 7. A device that turns on and off electrical flow. **Switch** 8. A device that turns rotational motion into electricity. **Generator** 9. This form of power generation relies on the water rising and falling in the oceans. **Tidal** 11. This type of resource is the best because it is always being replenished. **Renewable** 12. **Solar** generation extracts energy from the Sun's light. 15. Energy out divided by energy in.. cannot be 100%. **Efficiency** # Static Electricity ## Crossword ### Across 2. **Lightning rods** provide a safe path for lightning to go into the ground. 5. A substance that allows the movement of electrons. **Conductor** 7. **Like** charges repel. 9. A charged atom is called this. **Ion** 10. The kind of electricity where the surface has an imbalance of charge. **Static** 13. An atom with no overall charge **Neutral**. 15. An instrument that detects electric charges. **Electroscope** 18. **Discharge** is a process where objects can lose their electric charge. 19. One type of electroscope is the **pith ball** electroscope 20. A type of charging where the charging objects doesn't touch the other. **Induction** 21. **Conservation** of Electric Charges. 23. An element commonly used in computers. **Silicon** 24. **Protons** have a positive electric charge. ### Down 1. A type of charging by rubbing objects together. **Friction** 3. The electrostatic **force** chart. 4. A substance that doesn't allow free electron flow. **Insulator** 6. The rapid transfer of excess charge is an electric **spark**. 8. All **metals** conduct electricity. 11. Neutral objects attract charged ones because of **charge** separation. 12. **Electrons** have a negative electric charge. 14. A giant spark from clouds to the ground. **Lightning** 16. A type of charging where one object touches another and transfers charge. **Conduction** 17. When grounding an object, it must be connected to the **ground**. 22. **Negative** particles move while **positive** particles stay in their place.