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

What is the value of resistance for an ideal voltmeter?

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

The emf of the cell of internal resistance 1.275 Ω balances against a length of 217 cm of a potentiometer wire. Find the balancing length when the cell is shunted by a resistance of 15 Ω.

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

What will a voltmeter of resistance 200 Ω read when connected across a cell of emf 2 V and internal resistance 2 Ω?

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 ______.

What is the effect of decreasing the current through the potentiometer on the null point?

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 ______.

A particle carrying 8 electron charges starts from rest and is accelerated through a potential difference of 9000 V. Calculate the KE acquired by it in keV.

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.