Assertion : A string has a mass (m ). If it is accelerated tension is non-uniform and if it is not accelerated tension is uniform. Reason : Tension force is an electromagnetic force.

Step-by-step solution

Why assertion is false - Even when the string is not accelerating as a whole, tension in a string with its own mass is generally non-uniform because different elements must support different portions of the string's weight or transmit different internal forces; only an ideal massless string has uniform tension. Why reason is false - Describing tension as an "electromagnetic force" is inaccurate in this context; tension is a contact force arising from internal stresses in the material and is not classified as a fund