Electrical Engineering : Electrical Engineering Materials QUESTIONS AND ANSWERS :: part3 : 11 to 15
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
11.Substances whose specific resistance abruptly decreases at very low temperature are called |
| insulators |
| conductors |
| semiconductors |
| superconductors |
12.Which of the following material is not a semiconductor ? |
| Silica |
| Germanium |
| Selenium |
| Gallium-arsenide |
13.Selenium is _____ semiconductor. |
| extrnisic |
| intmisic |
| N-type |
| P-type |
14.Which of the following materials is used for making coils of standard resistances ? |
| Copper |
| Nichrome |
| Platinum |
| Manganin |
15.Low resistivity materials are used in |
| transformer, motor and generator windings |
| transmission and distribution lines |
| house wiring |
| all above applications |
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