Exercise :: Electronic Devices and Circuits - Section 1
- Electronic Devices and Circuits - Section 1
- Electronic Devices and Circuits - Section 2
- Electronic Devices and Circuits - Section 3
- Electronic Devices and Circuits - Section 4
- Electronic Devices and Circuits - Section 5
- Electronic Devices and Circuits - Section 6
- Electronic Devices and Circuits - Section 7
- Electronic Devices and Circuits - Section 8
- Electronic Devices and Circuits - Section 9
- Electronic Devices and Circuits - Section 10
- Electronic Devices and Circuits - Section 11
- Electronic Devices and Circuits - Section 12
- Electronic Devices and Circuits - Section 13
- Electronic Devices and Circuits - Section 14
- Electronic Devices and Circuits - Section 15
- Electronic Devices and Circuits - Section 16
| 11. | At very high temperatures the extrinsic semi conductors become intrinsic because |
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Answer: Option B Explanation: Covalent bonds are broken. |
| 12. | When a voltage is applied to a semiconductor crystal then the free electrons will flow. |
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Answer: Option A Explanation: Since electrons are negatively charged they will flow towards positive terminal. |
| 13. | Ferrite have |
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Answer: Option C Explanation: Ferrite is a low density material of composition with Fe2O3 x O, where x is a bivalent metal, such as Cobart, Ni, Mn. These magnetic materials having very low loss of current and used in high frequency circuit. |
| 14. | In a p type material the Fermi level is 0.3 eV above valence band. The concentration of acceptor atoms is increased. The new position of Fermi level is likely to be |
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Answer: Option B Explanation: Addition of acceptor atom brings Fermi level closer to valence band. |
| 15. | In an n-p-n transistor, the majority carriers in the base are |
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Answer: Option A Explanation: Emitter is n type and emits electrons which diffuse through the base. |