HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Important Questions

State and prove: Law of conservation of angular momentum.

Derive the relation between surface tension and surface energy per unit area.

Obtain the expression for the period of a magnet vibrating in a uniform magnetic field and performing S.H.M.

State formula and S.I. unit of Magnetization.

Define the coefficient of self-induction.

What are eddy currents?

State formula and S.I. unit of Magnetization.

Define the coefficient of self-induction.

Describe, with the help of a circuit diagram, the working of Zener diode as a voltage regulator.

Write differences.

Tribal community and Rural Community

Write differences.

Casteism and Communalism

Distinguish between crystalline solid and amorphous solid.

Define Osmosis.

Define Osmosis.

Write the mathematical equation of the first law of thermodynamics for an isochoric process.

Define buffer solution.

Write the mathematical equation of the first law of thermodynamics for an isochoric process.

Calculate the e.m.f. of the following cell at 298 K:

Fe(s) | Fe²⁺ (0.001 M) | | H⁺ (0.01 M) | H₂(g) (1 bar) | Pt(s)

Given that \[\ce{E^0_{cell}}\] = 0.44 V

[log 2 = 0.3010, log 3 = 0.4771, log 10 = 1]

Define the Standard enthalpy of combustion.

Three moles of an ideal gas are expanded isothermally from 15 dm³ to 20 dm³ at a constant external pressure of 1.2 bar. Calculate the amount of work in Joules.