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1
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
donor
B
intrinsic
C
acceptor
D
extrinsic
2
MHT CET 2023 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$\frac{1}{\alpha}=\frac{1}{\beta}+1$$
B
$$\alpha=\frac{\beta}{1-\beta}$$
C
$$\alpha=\frac{\beta}{1+\beta}$$
D
$$\frac{1}{\beta}=\frac{1}{\alpha}-1$$
3
MHT CET 2023 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
always used in reverse biased condition
B
never used in forward or reserve biased condition
C
used both in forward and reverse biased condition depending upon its application
D
always used in forward biased condition
4
MHT CET 2023 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In semiconductors at room temperature,

A
the valence band is completely filled
B
the conduction band is completely filled
C
the condition band is partially filled and valence band is partially empty
D
the valence band is completely filled and the conduction band is partially filled
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