Question

51. The direction of electric current at one end of the electromagnet is clockwise
This end of the electromagnet
A) North Pole B) East Pole C) South Pole
D) the western pole​

Answer 1

Solution :-

We know that

\boxed{\bf CSA = \pi rl}

CSA=πrl

↠ CSA = π × 6 × 12

↠ CSA = π × 72

↠ CSA = 72π

∴ CSA is 72 π cm²

Answer 2

Answer:

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Explanation:

Answer is B.

A current carrying loop works like a electromagnet. The polarity of this magnet can be understood with the help of clock face rule. If the current is flowing in anti-clockwise direction, then the face of the loop shows North Pole. On the other hand, if the current is flowing in clockwise direction, then the face of the loop shows South Pole.