HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Physics

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.

Determine the series limit of Balmer, Paschen and Brackett series, given the limit for Lyman series is 911.6 Å.

Explain the working of the n-p-n transistor in a common base configuration.

Explain the construction and propagation of a spherical wavefront using Huygens's principle.

The collector current in a common-emitter transistor amplifier is 4 mA. When the base current is increased by 20 µA, the collector current increases to 6 mA. The current gain is ______.

How is a transistor biased for operating it as amplifier?

Why does hot soap water help to remove tough stains on a fabric?

What is magnetic hysterisis?

What is magnetic hysterisis?

State under what conditions will a charged particle moving through a uniform magnetic field travel in (i) a circular path (ii) a helical path.

The mutual inductance of a pair of adjacent coils is 1.5 H. If the current is one coil changes from 5 A to 10 A in 0.1 s, the rate of change of magnet flux linkage is ______.

Explain ferromagnetism on the basis of the domain theory.