1. An empty tube in which air has been completely removed for the purpose of storing liquidified gas is called
2. One of these is NOT a basic electronic device
3. The two types of semi-conductor are
4. A piece of an apparatus designed to store electrical energies in form of electric charges is called _____
5. The transitor has three electrodes in terminal which are as follows, EXCEPT
6. One of these is NOT an electronic appliances
7. Another name for cold-cathode emission is
8. A small unit, usually round in shape and covered thatch is called ______
9. One of these is NOT a building material
10. _________ are not commonly used nowadays but we're good roof covering materials in the past