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

What are forced vibrations? 

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

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?

The root mean square speed of the molecules of a gas is proportional to ______.
[T =Absolute temperature of gas]

Calculate the moment of inertia of a uniform disc of mass 10 kg and radius 60 cm about an axis perpendicular to its length and passing through its center.

Determine the shortest wavelengths of Balmer and Pasch en series. Given the limit for the Lyman series is 912 Å.

An emf of 91 mV is induced in the windings of a coil when the current in o nearby coil is increasing at the rate of 1.3 A/s. what is the mutual inductance (M) of the two coils in mH?

A particle performing Linear S.H.M. has a maximum velocity 25 cm/sand maximum acceleration 100 cm/s². Find the period of oscillations.