A circular coil of radius $$4$$ cm has $$50$$ turns. In this coil a current of $$2$$ A is flowing. It is placed in a magnetic field of $$0.1$$ weber $$/$$ $$m2$$. The amount of work done in rotating it through $$180$$° from its equilibrium position will be

Question

A circular coil of radius $$4$$ cm has $$50$$ turns. In this coil a current of $$2$$ A is flowing. It is placed in a magnetic field of $$0.1$$ weber $$/$$ $$m2$$. The amount of work done in rotating it through $$180$$° from its equilibrium position will be

Infinity Learn · Accepted Answer

Work done to rotate  $$W=MB1$$−$$cos$$θWhen  θ$$=180o$$                      $$W=2MBHere$$ M $$=$$ niA          W $$=$$ $$2$$.$$niAB=2$$×$$50$$×$$2$$×π$$4$$×$$10$$−$$220.1=20$$π×$$16$$ $$x10$$−$$4=32$$π×$$10$$−$$3=100$$×$$10$$−$$3=0.1J$$

A circular coil of radius 4 cm has 50 turns. In this coil a current of 2 A is flowing. It is placed in a magnetic field of 0.1 weber / $m^{2}$ . The amount of work done in rotating it through 180° from its equilibrium position will be

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A circular coil of radius 4 cm has 50 turns. In this coil a current of 2 A is flowing. It is placed in a magnetic field of 0.1 weber / m2. The amount of work done in rotating it through 180° from its equilibrium position will be

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A circular coil of radius 4 cm has 50 turns. In this coil a current of 2 A is flowing. It is placed in a magnetic field of 0.1 weber / $m^{2}$ . The amount of work done in rotating it through 180° from its equilibrium position will be