HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Physics

State and define the SI unit of mutual inductance.

Compare rates of loss of heat by the body at temperature 527°C and 127°C. Temperature of surrounding is 27°C.

Prove that, equivalent S.I. unit of surface tension is J/m².

How is the magnetic field of a small current loop identical to that of a short magnetic dipole? Explain.

Two coils having self inductances L₁ = 75 mH and L₂ = 55 mH are coupled with each other. The coefficient of coupling (K) is 0. 75. Calculate the mutual inductance (M) of the two coils

State and explain Stefan's law of radiation.

Define Boltzmann constant.

Calculate the amount of energy evolved when 343 droplets of mercury each of radius. 0.05 mm, combine to form one drop. The surface tension of mercury is 50 x 10^-2 N/m.

What is binding energy of a hydrogen atom?

Define the surface energy of the liquid.

State the principle on  which transformer works.

Explain the construction and working of the transformer. 

Derive an expression for ratio of e.m.f.s and currents in terms of number of turns in primary and secondary coil.

Explain Maxwell distribution of molecular speed with necessary graph.

State Ampere’s circuital law.

State Ampere’s circuital law.

Derive an expression for e.m.f. and current in terms of turns ratio

A transformer converts 240 V AC to 60 V AC. The secondary has 75 turns. The number of turns in primary are _______.

(A) 600

(B) 500

(C) 400

(D) 300

Obtain an expression for magnetic induction along the axis of the toroid.

Explain Ampere’s circuital law.