Solids Semi Conductor Devices and Communication System Test Online

1. The value of current gain α of a transistor is 0.98. The value of β will be:

2. Diode is used as a/an

3. The transfer ratio β of a transistor is 50. The input resistance of the transistor when used in the common emitter configuration is 1kΩ. The peak value of the collector A.C. current for an A.C. input voltage of 0.01 V, is

4. Which logic gate is represented by the following combination of logic gates?

5. In n-type semiconductor, majority charge carriers are

6. In a diode, when there is a saturation current the plate resistance will be:

7. When added an impurity into the silicon which one of the following produces n-type of semi-conductors:

8. The voltage gain of the following amplifier is

9. Consider an n-p-n transistor amplifier in common emitter configuration. The current gain of the transistor is 100. If the collector current changes by 1mA, what will be the change in emitter current

10. To a germanium sample, traces of gallium are added as an impurity. The resultant sample would behave like.

11. The circuit given below represents which of logic operations

12. In the following common emitter configuration an npn transistor with current gain β = 100 is used. The output voltage of the amplifier will be:

13. Which one of the following is true about the p-type and n-type semi-conductor?

14. Zener diode acts as a/an

15. A triode valve has an amplification factor of 20 and its plate is given a potential of 300 V. The grid voltage to reduce the plate current to zero is: