Electrical Engineering : Electrical Engineering Materials QUESTIONS AND ANSWERS :: part4 : 6 to 10
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.The conductivity of an extrinsic semiconductor with temperature |
| decreases |
| increases |
| remains constant |
| none of the above |
7.For a particular material the Hall coefficient was found to be zero. The material is |
| insulator |
| metal |
| intrinsic semiconductor |
| none of the above |
8.The forbidden gap in an insulator is |
| large |
| small |
| nil |
| any of the above |
9.The carbon percentage is least in |
| low carbon steel |
| wrought iron |
| cast iron |
| malleable iron |
10.For germanium the forbidden energy gap is |
| 0.15 eV |
| 0.25 eV |
| 0.5eV |
| 0.7eV |
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