Q112 / 125 · BITSAT 2011 · Physics

If $M$ is magnetic moment and $B$ is the magnetic field, then the torque is given by

  • A
    $\overrightarrow{\mathrm{M}} \cdot \overrightarrow{\mathrm{B}}$
  • B
    $\frac{|\overrightarrow{\mathrm{M}}|}{|\overrightarrow{\mathrm{B}}|}$
  • Correct answer
    C
    $\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}$
  • D
    $|\overrightarrow{\mathrm{M}} \| \overrightarrow{\mathrm{B}}|$

Solution

Torque, $\tau=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}$

Hence, the correct answer is option: 'C'.

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