Go with the flow

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Across
  1. 5. Two lines that never meet
  2. 6. It connect most of the circuit
  3. 7. It stops the circuit if there is too much flow
  4. 8. A thing that spins
  5. 9. You can't use electricity without it
Down
  1. 1. This dude made tons of inventions
  2. 2. It stops electricity
  3. 3. You can make it
  4. 4. When powered it can pick up metal items