MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
IF_THE_TEMPERATURE_IS_INCREASED_IN_SEMI-CONDUCTORS_SUCH_THAT_THE_RESISTANCE_INCESSANTLY_FALLS,_IT_IS_TERMED_AS_______?$ |
| A. | Avalanche breakdown |
| B. | Zener breakdown |
| C. | Thermal runway |
| D. | Avalanche runway |
| Answer» B. Zener breakdown | |
| 2. |
Materials_having_resistance_almost_equal_to_zero_is_______$ |
| A. | Semi-conductor |
| B. | Conductor |
| C. | Superconductors |
| D. | Insulators |
| Answer» D. Insulators | |
| 3. |
The rise or fall in resistance with the rise in temperature depends on _______? |
| A. | The property of the conductor material |
| B. | The current in the metal |
| C. | Both the given options |
| D. | Does not depend on any factor |
| Answer» B. The current in the metal | |
| 4. |
The temperature of a coil cannot be measured by which of the following methods? |
| A. | Thermometer |
| B. | Increase in resistance of the coil |
| C. | Thermo-junctions embedded in the coil |
| D. | Calorimeter |
| Answer» E. | |
| 5. |
A copper coil has a resistance of 200 ohms when its mean temperature is 0 degree centigrade. Calculate the resistance of the coil when its mean temperature is 80 degree centigrade. |
| A. | 268.5 ohm |
| B. | 268.5 kilo-ohm |
| C. | 286.5 ohm |
| D. | 286.5 kilo-ohm |
| Answer» B. 268.5 kilo-ohm | |
| 6. |
What is the unit of temperature coefficient? |
| A. | ohm/centigrade |
| B. | ohm-centigrade |
| C. | centigrade<sup>-1</sup> |
| D. | centigrade |
| Answer» D. centigrade | |
| 7. |
Which of the following statements are true about metals? |
| A. | Metals have a positive temperature coefficient |
| B. | Metals have a negative temperature coefficient |
| C. | Metals have zero temperature coefficient |
| D. | Metals have infinite temperature coefficient |
| Answer» B. Metals have a negative temperature coefficient | |
| 8. |
The resistance of insulators __________ |
| A. | Increases with an increase in temperature |
| B. | Decreases with an increase in temperature |
| C. | Remains the same with an increase in temperature |
| D. | Becomes zero with an increase in temperature |
| Answer» C. Remains the same with an increase in temperature | |
| 9. |
The resistance of pure metals ___________ |
| A. | Increases with an increase in temperature |
| B. | Decreases with an increase in temperature |
| C. | Remains the same with an increase in temperature |
| D. | Becomes zero with an increase in temperature |
| Answer» B. Decreases with an increase in temperature | |