HSC Science (Computer Science) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

One gram of water (1 cm³) becomes 1671 cm³ of steam at a pressure of 1 atm. The latent heat of vaporization at this pressure is 2256 J/g. Calculate the external work and the increase in internal energy. 

A cylinder containing one gram molecule of the gas was compressed adiabatically until its temperature rose from 27°C to 97°C. Calculate the work done and heat produced in the gas (𝛾 = 1.5).

derive the relation between the change in internal energy (∆U), work is done (W), and heat (Q). 

State law of length.

What are forced vibrations? 

Show that even as well as odd harmonics are present as an overtone in modes of vibration of the string. 

What are Secondary sources? State Huygens’ Principle.

A pair of the adjacent coil has a mutual inductance of 1.5 H. If the current in one coil varies from 0 to 20 A in 0.5 s, what is the change of flux linked with the other coil. 

Define mutual inductance.

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 ______ 

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?  

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? 

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

What is rectification?