A light straight wire is to be kept suspended horizontally in air using a uniform…
MATHEMATICS · Single correct · A Level · Mathematics · Forces and Newton's laws · Forces and Newton's laws
Problem
A light straight wire is to be kept suspended horizontally in air using a uniform magnetic field. To achieve this with the least possible current through the wire, the angle between the direction of current and the magnetic field should be
(a) 60∘
(b) 90∘
(c) 0∘
(d) 30∘