Electricity and Magnetism

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Across
  1. 3. The common term for the difference in electrical potential energy between two points. (Example: The measure typically listed on household outlets, like 120 V or 240 V).
  2. 5. The SI unit for electrical resistance, named after a German physicist. (Example: Measured by the ratio of voltage to current, $R=V/I$).
  3. 9. The SI unit for potential difference (voltage), named after an Italian physicist. (Example: What is measured when you check the terminals of a battery with a multimeter).
  4. 12. The flow of electric charge that periodically reverses direction. (Example: The type of current supplied to homes and businesses by power companies).
  5. 13. The flow of electric charge that is constant and only moves in one direction. (Example: The type of current produced by a battery).
  6. 17. The act of producing an electrical effect (like charge or current) in a body by being near a magnetic field or charged object, without direct contact. (Example: How some stove tops heat a metal pot without heating the burner itself).
  7. 18. The two ends of a magnet where the magnetic force is strongest. (Example: They are always found in pairs, labeled North and South).
  8. 19. The space around a charged object where another charged object would experience a force. (Example: What causes dust particles to stick to a static-charged balloon).
  9. 20. A material through which electric charge does not flow easily. (Example: Glass, rubber, and pure water).
  10. 22. A device that converts mechanical energy into electrical energy using electromagnetic induction. (Example: A large machine powered by steam or wind that feeds power into the electrical grid).
  11. 23. A material through which electric charge can flow easily due to the movement of free electrons. (Example: Metals like copper, silver, and gold).
Down
  1. 1. A region within a magnetic material in which the magnetization is in a uniform direction. (Example: When these regions are aligned, a material becomes a permanent magnet).
  2. 2. The process of creating an electric current in a circuit by changing a magnetic field. (Example: The core principle behind how a generator produces electricity).
  3. 4. A circuit in which there are multiple paths for the current to flow. (Example: The way household wiring is arranged, so turning off one light doesn't turn off all the others).
  4. 6. A temporary magnet created by wrapping a coil of wire around an iron core and running an electric current through it. (Example: Used in doorbells and loudspeakers).
  5. 7. A device that converts electrical energy into mechanical energy by using the force between a magnetic field and an electric current. (Example: Used to power fans, pumps, and electric vehicles).
  6. 8. The area around a magnet where a force is exerted on other magnets or magnetic materials. (Example: What causes the needle of a compass to point North).
  7. 10. An electrical component designed to oppose or limit the flow of current. (Example: Used in a circuit to ensure that a sensitive component, like an LED, does not receive too much current).
  8. 11. A circuit in which the components are arranged end-to-end so that the current has only one path to follow. (Example: A string of older decorative lights where if one bulb burns out, the entire string goes dark).
  9. 12. The SI unit for electric current, equal to one Coulomb of charge passing a point per second. (Example: The rating often used to indicate the capacity of a circuit breaker).
  10. 14. The single value of resistance that could replace all the individual resistors in a circuit without changing the total current. (Example: Found by summing all resistances in a series circuit).
  11. 15. A device that increases or decreases the voltage of an Alternating Current. (Example: Used in power grids to change high-voltage transmission lines to lower, safer household voltage).
  12. 16. The difference in electric potential energy between two points in a circuit per unit of charge. (Example: Often referred to by the simpler term, 'voltage').
  13. 21. The rate at which electrical energy is transferred or consumed in a circuit, measured in Watts. (Example: A light bulb rated at 60 W is consuming this much energy per second).