A current carrying circular loop having n number of turns per unit length has a current I through it. If the current through it and the number of turns per unit length are doubled,

Question

A current carrying circular loop having n number of turns per unit length has a current I through it. If the current through it and the number of turns per unit length are doubled, then the magnetic field at the centre of the loop will:

Vimal Swarnkar · Accepted Answer

(b) increase by four times.. B at the centre ∝ n × I. Doubling both: B′ = (2n)(2I) ∝ 4 × B → four times.

Answer

(a) remain same.

Answer

(c) increase by two times.

Answer

(d) decrease by two times.

Geo-Scientist Prelims 2020 General Studies Q104: A current carrying circular loop having n number of turns per unit…

QuestionPhysics / magnetism