Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 4

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Which circuit will not show current in ammeter

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Important Questions on Semiconductor Electronics: Materials, Devices and Simple Circuits

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Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 5

In the energy band diagram of material shown in figure open circles and filled circles denotes holes and electrons respectively. The material is

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Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 7

Consider the junction diode is ideal. The value of current through the resistance of $300 Ω$ is

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Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 8

A silicon specimen is made into a

P

-type semi-conductor by doping, on an average, one indium atom per

5 \times 10^{7}

silicon atoms. If the number density of atoms in the silicon specimen is

5 \times 10^{28} atoms m^{- 3}

, then the number of acceptor atoms in silicon per cubic centimetre will be

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Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 9

A full wave rectifier circuit along with the input and output voltages is shown in the figure.

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The contribution to output voltage from diode $2$ is,

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Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 10

In a

p - n

junction the depletion layer of thickness

10^{- 6} m

has potential across it is

0.1 V

. The electric field is

(V m^{- 1})

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Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 11

If

l_{1}, l_{2}, l_{3}

are the lengths of the emitter, base and collector of a transistor then

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Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 12

A common emitter amplifier gives an output of

3 V

for an input of

0.01 V .

If the current gain of the transistor is

100

and the input resistance is

1 kΩ

, then the collector resistance is

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Gamma Question Bank for Medical Physics>Chapter 24 - Semiconductor Electronics: Materials, Devices and Simple Circuits>EXERCISE>Q 13

The minimum potential difference between the base and emitter required to switch a silicon transistor ON is approximately