In SHM, the restoring force is proportional to MCQ with Answer and Explanation

Explanation:
Galvanometer detects small currents and direction. Ammeter measures larger currents.

Explanation:
Hydrogen fusion to helium releases energy.

Explanation:
By Ampere's Circuital Law, for a solid wire carrying uniform current, the magnetic field inside (r < R) is B = (mu_0 * I * r) / (2piR^2), meaning B ∝ r (straight line). Outside the wire (r > R), B = (mu_0 * I) / (2pi*r), meaning B ∝ 1/r (rectangular hyperbola). Thus, it increases linearly then decays.