A straight conductor placed perpendicular to a uniform magnetic field of carries a…

MATHEMATICS · Single correct · ISC · Mathematics · Physics · Magnetic Effects of Current and Magnetism

Problem

A straight conductor placed perpendicular to a uniform magnetic field of

0.40\,\text{T}

carries a current of

2.0\,\text{A}

and experiences a force of

0.16\,\text{N}

. The same conductor is now supplied with a current of

4.0\,\text{A}

and rotated so that it makes an angle of

30^{\circ}

with the magnetic field. What is the new magnitude of the force on the conductor? (a)

0.32\,\text{N}

(b)

0.08\,\text{N}

(c)

0.16\,\text{N}

(d)

0.28\,\text{N}