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

Define binding energy per nucleon.

State the significance of binding energy per nucleon.

Which of the following quantities is a measure of stability of nucleus?

Spring constant is a dimensional constant. Justify.

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.

Calculate the values of x and y in the following nuclear reaction.

\[\ce{^227_89Ac -> ^211_82Pb + x[^4_2He]+ y[^0_-1e]}\]

What is binding energy of nucleus?

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.