Electrical Engineering : Electrical Engineering Materials QUESTIONS AND ANSWERS :: part3 : 16 to 20
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.Carbon rods are used in wet and dry cells because |
| carbon rod serves as conductor |
| carbon can resist the attack of bat�tery acid |
| both (a) and (b) |
| either (a) or (b) |
17.Which of the following are non-conductors of electricity? |
| Non-metal solids except carbon |
| Air and most other gases |
| Pure water and liquids in general except mercury |
| All of the above |
18.is the property of absorbing moisture from atmosphere. |
| Solubility |
| Viscosity |
| Porosity |
| Hygroscopicity |
19.The conduction of electricity, in semiconductors, takes place due to movement of |
| positive ions only |
| negative ions only |
| positive and negative ions |
| electrons and holes |
20.Which of the following is a semiconductor material ? |
| Phosphorous |
| Rubber |
| Silicon |
| Aluminium |
More Electrical Engineering Materials QUESTIONS AND ANSWERS available in next pages
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