Question

Try this................ ​

Answer 1

Answer:

Hola mate.. ☺

Explanation:

See attachment.....

So it is max for 30°

Answer 2

Correct option (c)

Explanation:

The direction of magnetic dipole moment is from south to north pole of the magnet.

In configuration(1)

${}^{m}net = \sqrt{ {m}^{2} + {m}^{2} } + 2mm \: cos90 {}^{o}$

$= \sqrt{ {m}^{2} } + {m}^{2} = 2 \sqrt{m}$

In configuration(2)

${}^{m} net = m - m= 0$

In configuration(3)

${}^{m} net = \sqrt{ {m}^{2} } + {m}^{2} + 2mm \cos(30 {}^{o} )$

$\sqrt{2 {m}^{2} } + 2 {m}^{2} ( \frac{ \sqrt{3} }{2} ) = m \sqrt{2} + \sqrt{3}$

In configuration(4)

${}^{m} net = \sqrt{ {m}^{2} } + {m}^{2} + 2mm \cos(60 {}^{o} )$

$\sqrt{2 {m}^{2} } + 2 {m}^{2} ( \frac{1}{2} ) = m \sqrt{3}$