Physics Important Questions 

Class XII

Important Question

Electric Charge & Field

1. Four equal changes & are placed at the four corners A,B, C, D of a square of length Calculate the force on charge at B.

2. Write three properties of electric field lines.

3. S, and s₂ are two hollow Concentric spheres enclosing charge q and 2q respectively as shown in fig.

What is the ratio of electric flux through s, and s₂ ?

4. Derive an expression of electric field due to a dipole at point on the axis 

5. Define linear charge density 

ABHYAAS ACADEMY 

Interference and Diffraction

1.Write the necessary conditions to obtain sustained interference.

2. What kind of fringes do you expect to observe if white light is used instead of monochromatic light.

3. Monochromatic light of wavelength 600nm is incident from air on a water surface. If the refractive index of water is 4/3, then find the wavelength of the refracted light.