
In the case of constants and of a transistor:
Answer
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Hint: The constant of a transistor is the ratio of the collector current to the emitter current while the constant of the transistor is the ratio of the collector current to the base current. The base current is lesser than the collector current which is lesser than the emitter current.
Formula used:
Complete step by step answer:
The ratio of the collector current to the emitter current in a transistor is represented by the constant . Therefore, mathematically,
-----(1)
In a transistor, the emitter current is the sum of the base current and the collector current .
Therefore, obviously it can be said that . Using this relation in (1), we can say that
The ratio of the collector current to the base current in a transistor is represented by the constant . Therefore, mathematically,
------(2)
Also, the base current in a transistor is much smaller than both the emitter current and the collector current . Therefore, mathematically, .
Using this relation in (2), it can be concluded that
Therefore, we have found out that and for a transistor.
Therefore, the correct option is .
Note: Students should not get confused between the ratios and of a semiconductor. In fact, the above-obtained result that is less than one and is greater than one serves as a help to students in recalling the formulae in other problems if they keep in mind that the base current is smaller than the collector current which is in turn smaller than the emitter current in the transistor.
Formula used:
Complete step by step answer:
The ratio of the collector current
In a transistor, the emitter current
Therefore, obviously it can be said that
The ratio of the collector current
Also, the base current
Using this relation in (2), it can be concluded that
Therefore, we have found out that
Therefore, the correct option is

Note: Students should not get confused between the ratios
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