HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

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.

Explain ferromagnetism on the basis of the domain theory.

The internal energy of one mole of argon is ______.

Explain the origin of paramagnetism on the basis of atomic structure.

Explain the origin of paramagnetism on the basis of atomic structure.

Derive an expression for the electric potential at a point due to a short electric dipole. Hence, write the expression for the electric potential at a point (i) dipole axis and (ii) on the dipole equator.

In a CE amplifier, the current gain is 80 and the emitter current is 9 mA. The base current is ______.

What is a photocell or photoelectric cell?

Describe its construction and working with a neat labelled diagram.