Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Moving Charges and Magnetism

Question:

A magnet of magnetic moment $50\hat iAm^2$ is placed along the X-axis in a magnetic field $\vec B=(0.5\hat i+3.0\hat j) T$. The torque acting on it is

Options:

$175\hat k\, Nm$

$150\hat k\, Nm$

$75\hat k\, Nm$

$25\sqrt{37}\hat k\, Nm$

Correct Answer:

$150\hat k\, Nm$

Explanation:

$\tau = \vec{m}\times \vec{B} = 150\hat{k} N-m$

The correct answer is Option (2) → $150\hat k\, Nm$