Electricity

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Across
  1. 3. an alloy
  2. 5. electrical Energy
  3. 7. Joule's heating
  4. 9. current
  5. 10. electron
Down
  1. 1. safety devices
  2. 2. potential difference
  3. 4. SI unit
  4. 6. source of energy
  5. 8. variable resistor