A straight wire of total length passes through a rectangular region where a uniform…

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

Problem

A straight wire of total length

40\,\text{cm}

passes through a rectangular region where a uniform magnetic field exists only over the central

10\,\text{cm}

segment. The current in the wire is perpendicular to the field. Which length should be substituted for

L

while calculating the magnetic force on the wire? (a)

40\,\text{cm}

(b)

20\,\text{cm}

(c)

10\,\text{cm}

(d)

30\,\text{cm}