Electricity crossword puzzle

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Across
  1. 5. doesn't allow the passage of heat or sound
  2. 8. opposites and negatives ...
  3. 10. ... = v x a
  4. 11. in series ... = P.D1 + P.D2
  5. 14. 6,24 x 10^18
  6. 15. the property of a conductor
Down
  1. 1. the man who determined the conversion between C and e
  2. 2. a connection between electrical components
  3. 3. the unit of measurement of resistance
  4. 4. an electric cell
  5. 6. an electricity produced by friction
  6. 7. comprises branches so that the current divides and part of it flows through any branch
  7. 9. unit of measurement for current
  8. 12. the flow of electric charge that travels through a circuit
  9. 13. ... = I x R