NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>MCQ>Q 14.14

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What happens during regulation action of a Zener diode?

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

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NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>MCQ>Q 14.15

To reduce the ripples in a rectifier circuit with capacitor filter

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NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>MCQ>Q 14.16

The breakdown in a reverse biased

p - n

junction diode is more likely to occur due to

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NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>VSA>Q 14.17

Why are elemental dopants for Silicon or Germanium usually chosen from group

XIII

or group

XV

?

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NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>VSA>Q 14.18

Sn, C,

Si, Ge

are all group

XIV

elements. Yet,

Sn

is a conductor,

C

is an insulator while

Si

and

Ge

are semiconductors.Why?

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NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>VSA>Q 14.19

Can the potential barrier across a

p - n

junction be measured by simply connecting a voltmeter across the junction?

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NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>VSA>Q 14.2

Draw the output waveform across the resistor.

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NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>VSA>Q 14.21

The amplifiers $X, Y$ and $Z$ are connected in series. If the voltage gains of $X, Y$ and $Z$ are $10, 20$ and $30$ , respectively and the input signal is $1 mV$ peak value, then what is the output signal voltage (peak value)

(i) if $dc$ supply voltage is $10 V$ ?

(ii) if $dc$ supply voltage is $5 V$ ?

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NCERT Exemplar Physics - Class 12>Chapter 14 - Semiconductor Electronics: Materials, Devices and Simple Circuits>VSA>Q 14.22

In a

CE

transistor amplifier there is a current and voltage gain associated with the circuit. In other words there is a power gain. Considering power a measure of energy, does the circuit voilate conservation of energy?