| 1. | At much lower temperature, semiconductors behave as ? | |
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Semiconductors only
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Conductors
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Insulators
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Conductor or insulator
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Report Question| 2. | Which one of the following conditions passive element ? | |
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Bipolar Junction Transistor (BJT)
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An Inductor
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An Operational Amplifier
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Field Effect Transistor (FET)
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| 3. | Reverse saturation current in germanium diode, is of the order of ? | |
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1 nano Ampere
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1 micro Ampere
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1 milli Ampere
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10 milli Ampere
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| 4. | The concentration of minority carriers in an extrinsic semiconductor under equilibrium is ? | |
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Directly proportional to the intrinsic concentration
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Inversely proportional to the intrinsic concentration
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Directly proportional to the doping concentration
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Inversely proportional to the doping concentration
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| 5. | In forward region of its characteristics, a diode appears as ? | |
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an ON switch
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an OFF switch
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a capacitor
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an high resistor
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| 6. | The doping concentration on the n-side of a p-a junction diode is enhanced. Which one of the following will get affected ? | |
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Width of the depletion region on n-side
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Width of the depletion region on p-side
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Width of the depletion region on both sides
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No change in width of depletion regions
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| 7. | In an intrinsic semiconductor, the Fermi level ? | |
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Lies at the centre of forbidden energy gap
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Is near the conduction band
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Is near the valence band
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May be anywhere in the forbidden energy gap
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| 8. | In a P type material the Fermi level is 0.3 eV above the valence band. The concentration of accepter atoms is increased. The new position of Fermi level is likely to be ? | |
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0.5 eV above the valence band
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0.2 eV above the valence band
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Below the valence band
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None of the above
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| 9. | Most commonly used semiconductor material is ? | |
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Silicon
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Germanium
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Mixture of silicon and germanium
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None of the above
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| 10. | In a metal ? | |
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The electrical conduction is by electrons and holes
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The conductivity decreases with the rise in temperature
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The conduction band is empty
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None of the above
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