Semiconductor Electronics: Materials, Devices and Simple Circuits

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Question

A student wants to use two p-n junction diodes to convert alternating current into direct current. Draw the labelled circuit diagram she would use and explain how it works.

Solution

The circuit of full wave rectifier is as shown below;

Principle: The underlying working principle of full wave rectifier is that the p-n junction conducts when it is forward biased and does not condut when it is reverse biased.

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Question

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Give the truth table and circuit symbol for NAND gate.

Solution

NAND gate: Wired Faculty

Question

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Draw the typical input and output characteristics of an n-p-n transistor in CE configuration. Show how these characteristics can be used to determine (a) the input resistance (r_i), and (b) current amplification factor.

Solution

$r_{i} = {(\frac{∆ V_{B E}}{∆ I_{C}})}_{V_{C E}} r_{o} = {(\frac{∆ V_{C E}}{∆ I_{C}})}_{I_{B}} β_{a c} = {(\frac{∆ I_{C}}{∆ I_{B}})}_{V_{C E}}$

Question

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A p–n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit.

Solution

Only +ve current passes though the diode. Given figure is half wave rectifier.

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Semiconductor Electronics: Materials, Devices and Simple Circuits

A student wants to use two p-n junction diodes to convert alternating current into direct current. Draw the labelled circuit diagram she would use and explain how it works.

Give the truth table and circuit symbol for NAND gate.

Draw the typical input and output characteristics of an n-p-n transistor in CE configuration. Show how these characteristics can be used to determine (a) the input resistance (r_i), and (b) current amplification factor.

A p–n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

WhatsApp Group

Download Android App

Ncert Book Download

Semiconductor Electronics: Materials, Devices and Simple Circuits

A student wants to use two p-n junction diodes to convert alternating current into direct current. Draw the labelled circuit diagram she would use and explain how it works.

Give the truth table and circuit symbol for NAND gate.

Draw the typical input and output characteristics of an n-p-n transistor in CE configuration. Show how these characteristics can be used to determine (a) the input resistance (ri), and (b) current amplification factor.

A p–n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Draw the typical input and output characteristics of an n-p-n transistor in CE configuration. Show how these characteristics can be used to determine (a) the input resistance (r_i), and (b) current amplification factor.