SCERT Maharashtra solutions for Physics [English] 12 Standard HSC chapter 16 - Semiconductors Devices [Latest edition]

In a Bipolar junction transistor, the largest current flows through ______  

A LED emits visible white light when its ______  

Choose the correct option.

Solar cell operates on the principle of ______.

The Boolean expression for Exclusive OR gate (X-OR gate) is ______  

In a common base configuration, the transistor has an emitter current of 10 mA and a collector current of 9.8 mA. The value of base current is ______ 

For a transistor β =75 and I_E = 7.5 mA. The value of α is ______ 

In a transistor amplifier, I_C = 5.5 mA , I_E = 5.6 mA. The current amplification factor β is ______ 

For which logic gate the following statement is true? The output is low, if and only if all inputs are low ______.

State any two special-purpose diodes.

What is the purpose of the capacitor filter in the regulated power supply?  

State the logical expression for NAND gate.

Which method of biasing is used for operating a transistor as an amplifier?

Draw the circuit symbol of the PNP transistor. 

For a transistor I_C = 15 mA, I_B = 0.5 mA. What is the current amplification factor?  

Give the truth table for NOR gate.

What is the need for rectification in the regulated power supply? 

Draw a neat labelled circuit diagram of a full-wave rectifier using a semiconductor diode.

Draw a neat labelled circuit diagram for transistors as common emitter amplifiers. 

State any two advantages and disadvantages of a photodiode. 

State the advantages of a full-wave rectifier.  

Define current amplification factor α_DC and β_DC Obtain the relation between them. 

Draw the block diagram of a simple rectifier circuit with the respective output waveform. 

Give the truth table and Boolean expression for

Draw the circuit diagram of a half-wave rectifier. Hence explain its working. 

Explain the construction and working of the solar cells.

Explain the working of LED.

Explain the principle of operation of a photodiode.

What is a logic gate? Draw the symbol and give the truth table for NOT gate. Why NOT the gate is called an inverter? 

Explain the working of the PNP transistor? 

Draw the circuit symbol for NPN and PNP transistors. What is the difference in the Emitter, Base, and Collector regions of a transistor? 

With the help of a neat diagram, explain the working of the npn transistor?  

With the help of a neat circuit diagram, explain the transistor as an amplifier? 

Define the dark current of the photodiode. What are the advantages and disadvantages of a photodiode?  

Draw the circuit diagram to study the characteristic of the transistor in common emitter mode. Draw the input and output characteristics.