The process of adding impurity to a semiconductor is called MCQ with Answer and Explanation

Explanation:
A transformer operates on the principle of mutual induction. It consists of primary and secondary coils. When an alternating current flows through the primary coil, it generates a changing magnetic field. This fluctuating flux links with the secondary coil, inducing an alternating electromotive force (EMF) in it according to Faraday's Law.

Explanation:
F = qvB sinθ, max at θ=90°.

Explanation:
Ice displaces water equal to its weight; when melted, occupies exactly that volume. Level unchanged.