A straight conductor is being slowly pulled across the boundary of a uniform magnetic…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

A straight conductor is being slowly pulled across the boundary of a uniform magnetic field so that

15\,\text{cm}

of its length is inside the field at an instant. The immersed segment makes an angle of

30^{\circ}

with the direction of the magnetic field. The current in the conductor is

6\,\text{A}

and the magnetic field strength is

0.50\,\text{T}

. What is the magnitude of the magnetic force on the conductor at this instant? (a)

0.390\,\text{N}

(b)

0.225\,\text{N}

(c)

0.450\,\text{N}

(d)

0.195\,\text{N}