Module 3 Unit 1 Vocab

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Across
  1. 1. A material through which it is difficult to conduct an electric current.
  2. 3. Electrically neutral particles (neither positive nor negative) that have the same mass as a proton and are found in the nucleus of an atom.
  3. 6. Any substance that has mass and occupies space.
  4. 7. A quantity of electricity that is either positive or negative.
  5. 9. An electrical property that opposes the flow of current through a circuit. Resistance (R) is measured in ohms.
  6. 12. Materials through which it is relatively easy to maintain an electric current.
  7. 13. A DC voltage source consisting of two or more cells that convert chemical energy into electrical energy.
  8. 16. Devices consisting of one or more coils of wire wrapped around a common core. Transformers are commonly used to step voltage up or down.
  9. 18. The unit of measurement for voltage, represented by the letter V. One volt is equivalent to the force required to produce a current of one ampere through a resistance of one ohm.
  10. 19. The center of an atom. It contains the protons and neutrons of the atom.
  11. 20. The movement, or flow, of electrons in a circuit. Current (I) is measured in amperes.
  12. 21. The smallest positively charged particle of an atom. Protons are contained in the nucleus of an atom
  13. 22. The driving force that makes current flow in a circuit. Voltage, often represented by the letter E, is also referred to as electromotive force difference of potential, or electrical pressure.
Down
  1. 2. The basic unit of measurement for electrical current, represented by the letter A.
  2. 4. Negatively charged particles that orbit the nucleus of an atom.
  3. 5. The basic unit of measurement for resistance, represented by the symbol Ω.
  4. 8. Electromechanical devices consisting of a coil and one or more sets of contacts. Used as a switching device.
  5. 10. A complete path for current flow.
  6. 11. The rate of doing work, or the rate at which energy is used or dissipated. Electrical power is measured in watts.
  7. 14. The smallest particles to which an element may be divided and still retain the properties of the element.
  8. 15. The basic unit of measurement for electrical power, represented by the letter W.
  9. 17. Electromagnetic coils used to control a mechanical device such as a valve.
  10. 18. shell The outermost ring of electrons that orbit about the nucleus of an atom.