11. At room temperature, an intrinsic silicon crystal acts approximately as A. A battery B. A conductor C. An insulator D. A piece of copper wire Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
12. A pn junction acts as a ___________ A. Controlled switch B. Bidirectional switch C. Unidirectional switch D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
13. Addition of pentavalent impurity to a semiconductor creates many A. Free electrons B. Holes C. Valence electrons D. Bound electrons Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
14. Addition of trivalent impurity to a semiconductor creates many A. Holes B. Free electrons C. Valence electrons D. Bound electrons Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
15. In an intrinsic semiconductor, the number of free electrons A. Equals the number of holes B. Is greater than the number of holes C. Is less than the number of holes D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
16. A hole in a semiconductor is defined as ___________ A. A free electron B. The incomplete part of an electron pair bond C. A free proton D. A free neutron Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
17. With forward bias to a pn junction , the width of depletion layer A. Decreases B. Increases C. Remains the same D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
18. A semiconductor is formed by bonds. A. Covalent B. Electrovalent C. Co-ordinate D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
19. The leakage current in a pn junction is of the order of A. Aa B. mA C. kA D. µA Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
20. When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on A. Junction capacitance B. Minority carriers C. Majority carriers D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board