A Level Physics Electricity

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Across
  1. 3. A pictorial representation of an electrical component
  2. 4. The ratio of useful energy given out by a machine, to the amount of energy put into the machine
  3. 6. …is measured in ohm-metres
  4. 8. The work done moving a unit of charge between 2 points in a circuit
  5. 10. The work done the work done moving a unit of charge between 2 points in a circuit
  6. 16. The amount of electrical energy a power supply transfers to each coulomb of charge
  7. 20. A component used to measure the p.d. across another component in a circuit
  8. 21. A watt is defined as a rate of transfer equal to 1 joule per second
  9. 22. The degree to which an object conducts electricity
  10. 23. allows current flow in one direction only
  11. 24. The amount of charge that passes in one second when the current is one ampere
  12. 25. The p.d. between the 2 terminals of a power supply.
  13. 26. A resistor with a resistance that depends on the intensity of light falling on it
Down
  1. 1. A circuit containing a voltage source and a pair of resistors. The voltage across one of the resistors is used as an output voltage. If the resistors aren't fixed the circuit will be capable of producing a variable output voltage
  2. 2. The rate of doing work
  3. 5. The resistance created I a power source when electrons collide with atoms inside the power source and lose energy
  4. 7. Resistance in an a.c. circuit when voltage and current are constant
  5. 9. A (semi-conductor)resistor with a resistance that depends on its temperature
  6. 11. A material that has zero resistivity when cooled below a critical (transitional) temperature
  7. 12. The rate of flow of charge in a circuit
  8. 13. The unit of p.d
  9. 14. A component used to measure the current flowing through a circuit
  10. 15. Energy cannot be created or destroyed. It can be transferred from one form to another, but the total amount of nergy in a closed system will not change
  11. 17. Voltage per unit of current
  12. 18. A graph which shows how the current (I) flowing through a component changes as the p.d. (v) is increased
  13. 19. When their temperature rises, they can release more charge carriers and their resistance decreases