HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Important Questions

Explain two types of diffraction of light.

In interference pattern, using two coherent sources of light; the fringe width is ________

(a) directly proportional to the wavelength

(b) inversely proportional to the square of the wavelength

(c) inversely proportional to wavelength.

(d) directly proportional to the square of the wavelength.

State the conditions to get constructive and destructive interference of light.

In a biprism experiment, the light of wavelength 5200Å is used to get an interference pattern on the screen. The fringe width changes by 1.3 mm when the screen is moved towards biprism by 50 cm. Find the distance between two virtual images of the slit.

In Young’s experiment interference bands were produced on a screen placed at 150 cm from two slits, 0.15 mm apart and illuminated by the light of wavelength 6500 Å. Calculate the fringe width.

Two coherent sources of light having intensity ratio 81 : 1 produce interference fringes. Calculate the ratio of intensities at the maxima and minima in the interference pattern.

Monochromatic light of wavelength 4300 Å falls on a slit of width ‘a’. For what value of ‘a’ the first maximum falls at 30° ?

Soft iron is used to make the core of the transformer because of its ______.

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

Answer in brief.

Discuss the Curie law for paramagnetic material.

A short bar magnet is placed in an external magnetic field of 700 gauss. When its axis makes an angle of 30° with the external magnetic field, it experiences a torque of 0.014 Nm. Find the magnetic moment of the magnet, and the work done in moving it from its most stable to the most unstable position.

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 electron in the hydrogen atom is moving with a speed of 2.5 × 10⁶ m/s in an orbit of a radius of 0.5 Å. What is the Magnetic moment of the revolving electron?    

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. 

Write the mathematical formula for Bohr magneton for an electron revolving in n^th orbit.