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In a bipolar junction transistor, the current gain β.
- a)Does not change with the change in temperature
- b)Increases exponentially with the increase in temperature
- c)Decreases with the increase in temperature
- d)Increases with the increase in temperature
Correct answer is option 'D'. Can you explain this answer?
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In a bipolar junction transistor, the current gain β.a)Does not c...
The current gain β is defined as 
At higher temperatures the thermal injection increases the collector current & hence β increases.
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In a bipolar junction transistor, the current gain β.a)Does not c...
Explanation:
Bipolar junction transistors are semiconductor devices that consist of three layers of semiconductor material. The current gain β of a bipolar junction transistor is defined as the ratio of the output current (collector current) to the input current (base current).
Effect of temperature on current gain β:
- As the temperature increases, the current gain β of a bipolar junction transistor tends to increase. This is because at higher temperatures, there is an increase in the number of charge carriers (electrons and holes) in the semiconductor material.
- The increase in the number of charge carriers leads to a higher current gain β as more charge carriers are available to flow from the base to the collector in the transistor.
Reason for increase in current gain β with temperature:
- At higher temperatures, the thermal energy breaks more covalent bonds in the semiconductor material, creating more charge carriers.
- This increase in charge carriers results in a higher current gain β as more charge carriers are available for conduction in the transistor.
Therefore, the current gain β of a bipolar junction transistor increases with an increase in temperature.
Bipolar junction transistors are semiconductor devices that consist of three layers of semiconductor material. The current gain β of a bipolar junction transistor is defined as the ratio of the output current (collector current) to the input current (base current).
Effect of temperature on current gain β:
- As the temperature increases, the current gain β of a bipolar junction transistor tends to increase. This is because at higher temperatures, there is an increase in the number of charge carriers (electrons and holes) in the semiconductor material.
- The increase in the number of charge carriers leads to a higher current gain β as more charge carriers are available to flow from the base to the collector in the transistor.
Reason for increase in current gain β with temperature:
- At higher temperatures, the thermal energy breaks more covalent bonds in the semiconductor material, creating more charge carriers.
- This increase in charge carriers results in a higher current gain β as more charge carriers are available for conduction in the transistor.
Therefore, the current gain β of a bipolar junction transistor increases with an increase in temperature.
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In a bipolar junction transistor, the current gain β.a)Does not change with the change in temperatureb)Increases exponentially with the increase in temperaturec)Decreases with the increase in temperatured)Increases with the increase in temperatureCorrect answer is option 'D'. Can you explain this answer?
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