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.

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 Check 

Across: 3. __________ attraction 6. __________ impurity 7. __________ bias. When a diode is not conducting. 9. Tubes are electronic components sealed in a glass __________ 11. The type of bond when atoms share electrons. 13. Negative lead or side of a diode. 15. One of the most common semiconductor materials. 16. __________-wave rectifier 18. __________ biased 21. __________ tube. One with 3 parts. 22. Positive or p-type side of a diode. 24. The process of adding impurities to semiconductor material. 25. Positive lead or side of a diode tube.

Down: 1. __________ emission. The process of using heat to make free electrons. 2. A common semiconductor material. 4. A special circuit that turns AC into some type of DC. 5. A solide state device that conducts electricity in only one direction. 8. Vacuum tubes are also called __________ tubes. 10. P-N __________ 12. Electron __________ bond. 13. __________ rectifier is another name for a solid-state diode. 14. Peak __________ Voltage. Max reverse bias voltage that can be safely appiled to a diode. 17. One can use an electrolytic cap to __________ DC in order to make it more steady. 19. __________ impurity. 20. The 2 possible voltage states of a diode. They can be forward or reverse __________. 23. A special full-wave rectifier that uses 4 diodes to make very steady DC.