HSC Science Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Physics

Discuss about Nicol prism.

How is polarisation of light obtained by scattering of light?

What is normal focusing?

Derive the equation for an angle of deviation produced by a prism and thus obtain the equation for the refractive index of the material of the prism.

Obtain the equation for dispersive power of a medium

Why does sky look blue and clouds look white?

Why is yellow light preferred to during fog?

Is there any difference between coloured light obtained from prism and colours of soap bubble?

An unpolarised light of intensity 32 Wm^-2 passes through three Polaroids such that the axes of the first and the last Polaroids are at 90°. What is the angle between the axes of the first and middle Polaroids so that the emerging light has an intensity of only 3 Wm^-2?

The reflected light is found to be plane polarised when an unpolarized light falls on a denser medium at 60° with the normal. Find the angle of refraction and critical angle of incidence for total internal reflection in the denser to rarer medium reflection.

What is an integrated circuit?

State and prove De Morgan’s first and second theorem.

Write a short note on ‘electrostatic shielding’.

What is polarisation?

What is dielectric strength?

Discuss the various properties of conductors in electrostatic equilibrium.

Explain the process of electrostatic induction.

Explain dielectrics in detail and how an electric field is induced inside a dielectric.

An electron and a proton are allowed to fall through the separation between the plates of a parallel plate capacitor of voltage 5 V and separation distance h = 1 mm as shown in the figure.

1. Calculate the time of flight for both electron and proton.
2. Suppose if a neutron is allowed to fall, what is the time of flight?
3. Among the three, which one will reach the bottom first?

(Take m_p = 1.6 x 10^-27 kg, m_e= 9.1 x 10^-31 kg and g = 10 m s^-2)

State Biot-Savart’s law.