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1
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
2
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
3
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The Boolean expression for the following combination is

MHT CET 2023 13th May Evening Shift Physics - Semiconductor Devices and Logic Gates Question 14 English

A
$$(\overline{A+B}) \cdot(A+B)$$
B
$$(\overline{A \cdot B})+(\bar{A} \cdot {B})$$
C
$$(\bar{A} \cdot B)+(A \cdot \bar{B})$$
D
$$(\bar{A}+B) \cdot(A+\bar{B})$$
4
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the maximum efficiency of a full wave rectifier is $$x \%$$ and that of half-wave rectifier is $$y \%$$, then the relation between $$x$$ and $$y$$ is

A
$$x=y$$
B
$$x=2 y$$
C
$$y=2 x$$
D
$$y=4 x$$
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