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The rectangular loop of Wire shown in fig. bas a mass of 0.15 g per centimetre of length and is pivoted about side ab on a frictionless axis. The current in the wire is 8.2 A in the direction shown. Find the magnitude and direction of the magnetic field parallel to the y-axis that will cause the loop to swing up until its plane makes an angle of 30.0o with the yz-plane.
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