Electronic Principles Questions And Answers.
Exercise ::
Electronic Principles
1. | In an intrinsic semiconductor, the number of free electrons |
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| A. | Equals the number of holes |
| B. | Is less than the number of holes |
| C. | Is greater than the number of holes |
| D. | Impossible to say |
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Published by:Michael Daani
2. | A device that converts mechanical into electrical energy is? |
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| A. | solar cell |
| B. | thermocouple |
| C. | chemical cell |
| D. | generator |
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Published by:Michael Daani
3. | Which one of the following kinds of materials has the lowest permeability? |
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| A. | A diamagnetic material |
| B. | A paramagnetic material |
| C. | A feiTomagnetic material |
| D. | All of the above |
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Published by:Michael Daani
4. | The total impedance of a parallel RLC circuit: |
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| A. | always increases as the applied frequency increases |
| B. | is equal to the sum of the values of resistance, inductive reactance and capacitive reactance |
| C. | always decreases as the applied frequency increases |
| D. | is maximum at the resonant frequency |
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Published by:Michael Daani
5. | The rise time of a pulse waveform is the time required for the voltage to rise: |
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| A. | from zero to its rms value |
| B. | from zero to its peak value |
| C. | from 10% of the peak value to 70.7% of the peak value |
| D. | from 10% of the peak value to 90% of the peak value |
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Published by:Michael Daani