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Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 18

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IMPORTANT

Earn 100

Which of the following energy band diagram shows the N-type semiconductor

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Important Questions on Semiconductor Devices

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Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 20

If

N -

type semiconductor is heated then-

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Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 24

Mobility of electrons in

n

-type

Ge

is

5000 {cm}^{2} v^{- 1} s^{- 1}

and conductivity is

5 mho {cm}^{- 1}

. If effect of holes is negligible, then impurity concentration will be

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Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 26

Pure

Si

at

300 K

has equal electron

(n_{e})

and hole

(n_{h})

concentrations of

1.5 \times 10^{16} m^{- 3}

. Doping by indium increases

n_{h}

to

4.5 \times 10^{22} m^{- 3}

. Calculate

n_{e}

in the doped

Si

.

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IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 27

The length of a germanium rod is

0.58 cm

and its area of cross-section is

1 {mm}^{2}

. If for germanium

n_{i} = 2.5 \times 10^{19} m^{- 3}, μ_{h} = 0.19 m^{2} {(V s)}^{- 1}, μ_{e} = 0.39 m^{2} {(V s)}^{- 1},

then the resistance of the rod will be -

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Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 39

The diffusion current in a

P - N

junction flows-

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Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 49

The resistance of a reverse baised

P - N

junction diode is about-

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Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 60

When the reverse potential in a semiconductor diode are

10 V

and

20 V

, then the corresponding reverse currents are

25 μA

and

50 μA

, respectively. The reverse resistance of junction diode will be

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Alpha Question Bank for Engineering: Physics>Chapter 35 - Semiconductor Devices>Exercise - 1>Q 93

Given truth table is for which GATE?

A	B	Y
$1$	$1$	$1$
$1$	$0$	$0$
$0$	$1$	$0$
$0$	$0$	$0$

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