Electromagnetic waves are produced by

The correct answer is Option (3) → charge particle moving along a circular path

Explanation:

Electromagnetic waves are produced by an accelerating charge (i.e., when the charge experiences a change in velocity or direction).

• A charge at rest produces only an electric field — no electromagnetic waves.

• A charge in uniform motion produces constant electric and magnetic fields — no radiation.

• A charged particle moving along a circular path is continuously accelerating (centripetal acceleration), hence it emits electromagnetic waves.

• A charge moving with velocity v along the direction of magnetic field experiences no force (since $\vec{v}$ ∥ $\vec{B}$), thus no acceleration and no radiation.

Correct statement: charge particle moving along a circular path.