EC8353 Important Questions Electron Devices and Circuits
EC8353 Important Questions Electron Devices and Circuits Regulation 2017 Anna University free download. Electron Devices and Circuits Important Questions EC8353 pdf free download.
Sample EC8353 Important Questions Electron Devices and Circuits:
1. Define Knee Voltage of a diode
The minimum voltage at which the diode starts conducting and current starts increasing Exponentially is called knee voltage of a diode.
2. What is peak inverse voltage
In reverse biased, opposite polarity voltage appears across diode. The maximum voltage which diode can withstand without breakdown is called peak inverse voltage. EC8353 Important Questions Electron Devices and Circuits
3. Differentiate drift and diffusion current
When a voltage is applied to a material, the free electrons move towards the positive of the battery.
While moving them collide with the adjacent atoms and keep changing their directions randomly.
In case of diffusion current, the external voltage is not required.
4. What is a PN Junction diode
There are two electrodes each from p-type and n-type materials and due to these two electrodes; the device is called a diode. It conducts only in one direction.
6. What are the advantages of bridge rectifier over its centre tapped counterpart?
No centre tap is required in the transformer secondary. Hence, wherever possible a.c Voltage can be directly applied to the bridge.
Due to pure alternating current in secondary of transformer, the transformer gets utilized effectively. EC8353 Important Questions Electron Devices and Circuits
7. What is meant by dynamic resistance of diode
The resistance offered by the p-n junction diode under a.c condtions is called dynamic resistance of diode.
10. What are the advantage and limitations of LCD Displays
-Less power consumption is the advantage of LCD displays.
-Poor reliability is the limitation of LCD Display. EC8353 Important Questions Electron Devices and Circuits
11. Define static and dynamic resistance of a PN diode.
The forward resistance of p-n junction diode when p-n junction is used in d.c
Circuit and the applied forward voltage is d.c. is called static resistance
The resistance offered by the p-n junction diode under a.c. conditions is called
dynamic Resistance of diode. EC8353 Important Questions Electron Devices and Circuits
| Subject name | Electron Devices and Circuits |
| Semester | 3 |
| Subject Code | EC8353 |
| Regulation | 2017 regulation |
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