Semiconductor Theory

1. A forward biased pn junction diode has a resistance of the order of

1. O
2. KO
3. MO
4. None of the above

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2. A hole and electron in close proximity would tend to ___________

1. Repel each other
2. Attract each other
3. Have no effect on each other
4. None of the above

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3. A hole in a semiconductor is defined as ___________

1. A free electron
2. The incomplete part of an electron pair bond
3. A free proton
4. A free neutron

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4. With forward bias to a pn junction , the width of depletion layer ___________

1. Decreases
2. Increases
3. Remains the same
4. None of the above

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5. A pn junction acts as a ___________

1. Controlled switch
2. Bidirectional switch
3. Unidirectional switch
4. None of the above

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6. A reverse bias pn junction has ___________

1. Very narrow depletion layer
2. Almost no current
3. Very low resistance
4. Large current flow

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7. A reverse biased pn junction has resistance of the order of

1. O
2. kO
3. MO
4. None of the above

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8. A semiconductor has generally valence electrons.

1. 4
2. 2
3. 3
4. 6

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9. A semiconductor has temperature coefficient of resistance.

1. Positive
2. Zero
3. Negative
4. None of the above

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10. A semiconductor is formed by ___________ bonds.

1. Covalent
2. Electrovalent
3. Co-ordinate
4. None of the above

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