HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions for Physics

Represent Radioactive Decay curve using relation `N = N_o e^(-lambdat)` graphically

The magnetic susceptibility of annealed iron at saturation is 4224. Find the permeability of
annealed iron at saturation. (μ₀ = 4Π × 10⁻⁷ SI unit)

The electron in the hydrogen atom is moving with a speed of 2.3x10⁶ m/s in an orbit of radius 0.53 Å. Calculate the period of revolution of the electron. (Π = 3.142)

The susceptibility of magnesium at 300 K is 1.2 x 10 ^-5 . What will be its susceptibility at 200 K.

What happens to a ferromagnetic material when its temperature increases above curie temperature?

Answer in brief.

Discuss the Curie law for paramagnetic material.

Determine the series limit of Balmer, Paschen, and Pfund series, given the limit for Lyman series is 912 Å.

What is the difference between a nuclear reactor and a nuclear bomb?

What is the magnetization of a bar magnet having a length of 6 cm and the area of cross-section 5 cm²?

A magnetic material of susceptibility 3 × 10⁻⁴, and magnetic intensity is 4 × 10⁻⁴ Am⁻¹. Then The magnetization in the units of Am⁻¹ is ______.

What does the ratio of magnetization to magnetic intensity indicate? 

The moment of a magnet (15 cm × 2 cm × 1 cm) is 1.2 A-m². What is its intensity of magnetization?  

A solenoid has a core of material with relative permeability 500 and its windings carry a current of 1 A. The number of turns of the solenoid is 500 per meter. Calculate the magnetization of the material. 

Define magnetic intensity.

Derive the relation between magnetic field intensity(H) and magnetization(M) for a magnetic material placed in a magnetic field. 

In Hydrogen, the electron jumps from the fourth orbit to the second orbit. The wavenumber of the radiations emitted by an electron is ______  

Show that half life period of radioactive material varies inversely to decay constant λ.

The half-life of a certain radioactive nucleus is 3.2 days. Calculate (i) decay constant (ii) average life of radioactive nucleus.

Show that for radioactive decay N(t) = `"N"_"O" "e"^{-λ"t"}`, where symbols have their usual meaning.

Obtain an expression for the half-lifetime of radioactive material. Hence state the relation between an average life and half life time of radioactive material.