Electricity

Crossword

  
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
1       2     3     4     5   
  6    7             
8        9       10      
     11            
12      13     14      15      
              16   
17      18        19       
               
  20         21   22       
               
     23    24          
         25        
 26                
               
27        28           

Across:

2. The unit of electrical power (4)
4. The colour of the neutral wire in a three pin plug (4)
8. A device that allows current flow in one direction only (5)
9. This type of rod can be rubbed with cloth to obtain an electric charge (7)
12. The unit of current (3)
13. The unit of electrical energy (5)
15. A lightning ___ is used to protect tall buildings (3)
17. This type of current flows in one direction only (6)
19. The unit of resistance (3)
20. This device converts electric energy into light energy (4)
21. The common name for the kilowatt-hour (4)
25. This type of electricity does not move (6)
26. A device which impedes the flow of elecric charge (8)
27. A household device which converts electrical to heat energy (5)
28. This does not allow electric current to flow (9)

Down:

1. An electronic device which lights up when electricity passes through it (3)
3. The number of pins in a household electrical plug (5)
5. An type of electric fish (3)
6. This metal is a very good conductor of electricity (6)
7. The symbol for a metal which conducts electricity (2)
10. This is a source and a sink for electric charge (5)
11. The unit of potential difference (4)
14. This wire may cause electrical shock on contact (4)
16. This substance is used to insulate electric cable (7)
17. Energy may be stored here before being converted into electrical energy by turbines (3)
18. The correct name for a battery (4)
20. Used to power circuits in the laboratory (7)
22. One of the wires in a three pin plug (7)
23. This safety device burns out when too much electricity passes through it (4)
24. The colour of the live wire in a plug (5)