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Electronic Principles - Section 1 Multiple Questions and Answers.
| 36. | A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns? | ||
| A. | 0.1 A | ||
| B. | 1000 A | ||
| C. | 10:00 AM | ||
| D. | 100 A | ||
| 37. | If a load resistance is 1 kW, a stiff current source has a resistance of | ||
| A. | At least 10 Ohm | ||
| B. | Less than 10 Ohm | ||
| C. | More than 100 k Ohm | ||
| D. | Less than 100 k Ohm | ||
| 38. | A flashlight battery has internal resistance of 1W. For what values of load resistance does the flashlight battery appear stiff? | ||
| A. | 60 Ohm | ||
| B. | 50 Ohm | ||
| C. | 100 Ohm or more | ||
| D. | 10 Ohm | ||
| 39. | The number of free electrons and holes in intrinsic semiconductor increases when the temperature | ||
| A. | Decreases | ||
| B. | Increases | ||
| C. | Stays the same | ||
| D. | 0oC | ||
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