MHT CET 2023 14th May Evening Shift | Semiconductor Devices and Logic Gates Question 2 | Physics

In an n-p-n transistor, the collector current is $$28 \mathrm{~mA}$$. If $$80 \%$$ of electrons reach the collector, its base current in $$\mathrm{mA}$$ is

MHT CET 2023 14th May Evening Shift

MCQ (Single Correct Answer)

-0

When the conductivity of a semiconductor is only due to the breaking of the covalent bonds, the semiconductor is called

donor

intrinsic

acceptor

extrinsic

MHT CET 2023 14th May Morning Shift

MCQ (Single Correct Answer)

-0

For a common emitter configuration, if '$$\alpha$$' and '$$\beta$$' have their usual meanings, the incorrect relation between '$$\alpha$$' and '$$\beta$$' is

$$\frac{1}{\alpha}=\frac{1}{\beta}+1$$

$$\alpha=\frac{\beta}{1-\beta}$$

$$\alpha=\frac{\beta}{1+\beta}$$

$$\frac{1}{\beta}=\frac{1}{\alpha}-1$$

MHT CET 2023 14th May Morning Shift

MCQ (Single Correct Answer)

-0

For emission of light, a light emitting diode (LED) is

always used in reverse biased condition

never used in forward or reserve biased condition

used both in forward and reverse biased condition depending upon its application

always used in forward biased condition

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