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A uniforme magnetic field of 1.5T exists...

A uniforme magnetic field of `1.5T` exists in a cylindrical region of radius `10.0 cm`. Its direction parallel to te axis along east to west. A wire carrying current of `7.0a`. In the north to south direction passes through this region. What is the magnitude and direction of the force on the wire if,
that wire in the N-S direction is lowered from the axis by a distance of `6.0cm`.

Text Solution

Verified by Experts

When the wire is lowered by 6 cm from the axis then the effective length of the wire inside the magnetic field is 2a [Fig. 1.98].

From figure `a=8` cm
`F=IB*2a=1.5xx7xx0.16N`
`=1.68N` (directed vertically downwards)
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