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Find the magnitude and direction of the ...

Find the magnitude and direction of the torque acting on the square loop as shown in the diagram, where B=1.5 T along positive Z-axis.

Text Solution

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`|tau| = m xx B = mB sin theta (hatj xx hatk)`
`=NIAB sin theta (hatj xx hatk)`
`=4 xx 10^(-4) xx 1.5 (hatj xx hatk)`
`=6xx10^(-4) N -m(hati)`
Here, `N=1, I=1A`
`A=4xx 10^(-4)m^(2)`
`B=1.5T`
`sin theta = sin 90^(@)=1`
Also, `tau` is directed along positive x-direction.
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