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 A germanium transistor used as an amplifier has a collector cut off current ICBO=10µA at a temperature 27°C and β=50. What is the collector current when the base current is 0.25mA?
  • a)
    10.76mA
  • b)
    13.01mA
  • c)
    15.67mA
  • d)
    11.88Ma
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A germanium transistor used as an amplifier has a collector cut off cu...
 IC=βIB+(1+β)ICBO
IC=50*0.25/1000+51/100000=13.01mA.
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Most Upvoted Answer
A germanium transistor used as an amplifier has a collector cut off cu...
ICBO stands for Collector Cut Off Current, which is the current that flows from the collector to the base when the transistor is in cut-off mode. In this case, the given value is ICBO = 10.

The collector cut off current is an important parameter to consider in transistor amplifiers because it determines the leakage current when the transistor is not actively conducting. It is generally desired to have a low ICBO value to minimize any potential distortion or noise in the amplifier circuit.

It is important to note that the given value of ICBO = 10 is not complete, as it does not specify the unit of measurement. Typically, ICBO is measured in microamps (μA) or nanoamps (nA).

In practice, when using a germanium transistor as an amplifier, it is essential to consider the ICBO value along with other transistor parameters, such as the current gain (hFE) and the maximum collector current (IC(max)). These parameters collectively determine the overall performance and operating range of the amplifier circuit.
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A germanium transistor used as an amplifier has a collector cut off current ICBO=10µA at a temperature 27°C and β=50. What is the collector current when the base current is 0.25mA?a)10.76mAb)13.01mAc)15.67mAd)11.88MaCorrect answer is option 'B'. Can you explain this answer?
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