4.1.1.2 Diode Properties

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Depletion region is the region in which;

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there are NO charge carriers (holes or electrons)

there are majority and minority charge carriers

there is plenty of electrons

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Which of the following is done to increase the number of charge carriers in semiconductor or to increase their conductivity by adding an impurity in intrinsic semiconductor?

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Doping

Forward biasing

Reverse biasing

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What is true regarding this circuit.

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It is forward biased

It is reverse biased

There will be no current in the circuit

The bulb will not glow

The bulb will glow

Anode is positive with respect to cathode

Which of the following are the characteristics of a diode? Select multiple.

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small size

less weight

high operating voltages

lower power dissipation

high reliability

short service life

Not vulnerable to Electro static discharge

Diodes are made up from which material?

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Insulators

Good conductors

Semiconductors

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Which of the following can be used to change the conductivity of Silicon or Germanium?

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Temperature

Impurity

Resistivity

Light Intensity

Semiconductors can behave as;

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conductors only

Insulators only

both conductors and Insulators

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In a diode, N-type material has;

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excess holes

excess electrons

a connection to negative terminal of the power supply

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In a diode, P-type material has;

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excess holes

excess electrons

a connection to positive terminal of the power supply

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Which statement is true regarding diode?

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it functions as a conductor (reverse bias) or an insulator (forward bias)

it functions as a conductor (forward bias) or an insulator (reverse bias)

it functions as a conductor (in both forward and reverse bias)

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The depletion region becomes narrow when;

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p-type is connected to the ‘-’ of the battery

n-type is connected to the ‘+’ of the battery

p-type is connected to the ‘+’ of the battery

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Which condition is a forward bias condition for diode.

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p-type is connected to the ‘-’ of the battery, n-type is connected to the ‘+’ of the battery

p-type is connected to the ‘+’ of the battery, n-type is connected to the ‘-’ of the battery

both the p-type and n-type are connected to the ‘+’ of the battery

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In which condition of diode, the depletion region widens?

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forward bias

reverse bias

no bias

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