A straight wire carrying a steady current is placed exactly along the direction of a…
MATHEMATICS · Single correct · ISC · Mathematics · Physics · Magnetic Effects of Current and Magnetism
Problem
A straight wire carrying a steady current is placed exactly along the direction of a uniform magnetic field. Which of the following statements correctly describes the magnitude of the force experienced by the wire?
(a) It is maximum because sin0∘=1, giving Fmax=ILB.
(b) It equals ILB since cos0∘=1 is used in F=ILBcosθ.
(c) It is zero because the wire is parallel to the field.
(d) It is half the maximum possible value, F=21ILB, as only half the current interacts.