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A straight wire is used ot form a semi-c...

A straight wire is used ot form a semi-circular wire of radius 2cm. IF a current I=10A is passing through the wire,then find the magnitude and direction of magnetic induction at the centre of the semicircle.

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UNITED BOOK HOUSE-MODEL PAPER SET-02-EXERCISE
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  12. What is the unit of radioactivity?

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