List of top Physics Questions asked in WBBSE XII

A voltmeter of resistance \( 300\,\Omega \) measures up to \( 150\,\text{V} \). Find the value of the shunt required to convert it into an ammeter capable of measuring \( 8\,\text{A} \).

State Lenz’s Law. Show that it is a consequence of the Law of Conservation of Energy.

Derive the Lens Maker’s Formula for a thin convex lens.

State Gauss’s Theorem. Use it to derive the electric field intensity due to an infinitely long straight charged wire.

Why can high or very low resistance not be measured accurately using the Wheatstone bridge principle?

Define the critical angle and state the conditions required for Total Internal Reflection (TIR).

What is the SI unit of magnetic flux?

If the distance between two point charges is doubled, the electrostatic force between them becomes—