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Semiconductor Electronics: Materials, Devices and

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2 weeks ago

Semiconductor Electronics: Materials, Devices and Class 12th

Statement A: In intrinsic semiconductors, conductivity is mainly due to the breakage of covalent bonds.

Statement B: In extrinsic semiconductors, the conductivity is mainly due to the addition of impurities.

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alok kumar singh

Contributor-Level 10

In intrinsic semiconductors, conductivity is mainly due to breakage of covalent bonds in extrinsic semiconductors, the conductivity is due to the addition of impurities.

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Semiconductor Electronics: Materials, Devices and Class 12th

An AND gate can be prepared by repetitive use of

a) NOT gate (b) OR gate (c) NAND gate (d) NOR gate

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alok kumar singh

Contributor-Level 10

On repetitive use of NAND GATE or NOR gate, any logic GATE can be prepared.

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Semiconductor Electronics: Materials, Devices and Class 12th

In a transistor if $\frac{I_{C}}{E_{E}} = α$ and $\frac{I_{C}}{I_{B}} = β$ . If $α$ varies between $\frac{20}{21}$ and $\frac{100}{101}$ , then the value of $β$ lies between

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alok kumar singh

Contributor-Level 10

The relation between $α$ and $β$ is given as

$β = \frac{α}{1 - α}$

$β_{1} = \frac{\frac{20}{21}}{1 - \frac{20}{21}} = 20$

$β_{2} = \frac{\frac{100}{101}}{1 - \frac{100}{101}} = 100$

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Semiconductor Electronics: Materials, Devices and Class 12th

What is the current through an ideal P – N junction diode shown in figure below?

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Vishal Baghel

Contributor-Level 10

$\Rightarrow l = \frac{2}{50} = 40 m A$

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Semiconductor Electronics: Materials, Devices and Class 12th

Avalanche breakdown of p-n junction diode is due to

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alok kumar singh

Contributor-Level 10

In reverse biasing, due to collision of electrons and atom, avalanche breakdown occurs.

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Semiconductor Electronics: Materials, Devices and Class 12th

The zener diode has a V_z = 30V. The current passing through the diode for the following circuit is…………mA.

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alok kumar singh

Contributor-Level 10

$l = \frac{90 ? 30}{4000} = 15 m A$

$I_{1} = \frac{30}{5000} = 6 m A & l_{2} = 9 m A$

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Semiconductor Electronics: Materials, Devices and Class 12th

A common transistor ratio set requires 12V (D.C) for its operation. The D.C source is constructed by using a transformer and a rectifier circuit, which are operated at 220V (A.C) on standard domestic A.C, supply. The number of turns of secondary coil are 24, then the number of turns of primary are___________.

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Vishal Baghel

Contributor-Level 10

$\frac{N_{p}}{N_{s}} = \frac{V_{p}}{V_{s}} \Rightarrow N_{p} = \frac{V_{p}}{V_{s}} * N_{s} = \frac{220}{12} * 24 = 440$

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Semiconductor Electronics: Materials, Devices and Class 12th

A 5 V battery is connected across the points X and Y. Assume D₁ and D₂ to the normal silicon diodes. Find the current supplies by the battery if the +ve terminal of the battery is connected to point X.

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