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The resultant magnetic moment due to two current (i) carrying concentric coils of radius r, mutually perpendicular to each other will be- |
$\sqrt 2 I\pi r^2$ $\sqrt 2 I r^2$ $\sqrt 2 I\pi r$ $\sqrt 2 \pi r^2$ |
$\sqrt 2 I\pi r^2$ |
$\text{Magnetic Moment of two coils are equal and perpendicular to each other}$ $ \text{Resultant magnetic moment is } M'=\sqrt 2 M = \sqrt 2 I\pi r^2$ |
