Go To Your Study Dashboard

Get Answers to all your Questions

header-bg

Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole momentm . Which configuration has highest net magnetic dipole moment?

(a) (b)

(c) (d)

Option 1)
(a)

Option 2)
(b)

Option 3)
(c)

Option 4)
(d)

Answers (1)

best_answer

As we learnt in

Magnetic moment (M) -

M=NiA

- wherein

N-number of turns in the coil

i-current throughout the coil

A-area of the coil

In configuration (1) = $m_{net}=\sqrt{m^{2}+m^{2}+2mm\ cos\ 90^{o}}$ $\sqrt{m^{2}+m^{2}}=\sqrt{2}m$

In configuration (2) = $m_{net}=m-m=0$

In configuration (3) = $m_{net}=\sqrt{m^{2}+m^{2}+2m^{2} \ cos\ 30^{o}}$

$m_{net}=\sqrt{2m^{2}+2m^{2}\left(\frac{\sqrt{3}}{2} \right )}$

$m_{net}=m\sqrt{2+\sqrt{3}}$

In configuration (4) = $m_{net}=\sqrt{m^{2}+m^{2}+2m^{2} \ cos\ 60^{o}}$

$m_{net}=\sqrt{2m^{2}+2m^{2}\left(\frac{1}{2} \right )}=\sqrt{3}m$

Option 1)

(a)

Incorrect

Option 2)

(b)

Incorrect

Option 3)

(c)

Correct

Option 4)

(d)

Incorrect

Posted by

divya.saini

View full answer

Similar Questions

Latest Question