the

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Across
  1. 3. obstacle
  2. 5. solar
  3. 6. conduct
  4. 9. rely
  5. 10. alternate
  6. 12. insulate
  7. 13. volt
Down
  1. 1. watt
  2. 2. electrical
  3. 4. circuit
  4. 7. decrease
  5. 8. current
  6. 11. energy