High-Q | סימולציה 13

11

סימולציה מס' 13

פרק ראשון

– אנגלית

19. The distinction between intrinsic and extrinsic semiconductors is based on -

(1) the chemical content of the semiconductor (2) whether they have a positive or negative charge (3) the number of electrons in the outermost shell (4) the electronic devices in which they are used

20. It is implied in the text that extrinsic semiconductors -

(1) must have an excess of negative charge (2) have more applications than intrinsic semiconductors (3) are chemically pure (4) cannot be made from germanium or gallium arsenide

21. The beginning of the last paragraph (lines 15-22) is an example of -

(1) an intrinsic semiconductor (2) a semiconductor made of gallium arsenide (3) a typical use of a semiconductor (4) how doping alters a semiconductor

22. Since electrons have a negative charge, a semiconductor made of silicon and phosphorus would be -

(1) a better conductor of electricity than one made of boron and silicon (2) best suited for use in microprocessors

(3) an n-type semiconductor (4) a p-type semiconductor

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