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Q.

A solenoid having a length 25 cm and total nnumber of turns equal to 500, carries a current of 15 A. If we consider it to be a magnet then find its magnetization.

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a

3πAm−1

b

30000Am−1

c

30000πAm−1

d

300Am−1

answer is B.

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Detailed Solution

Volume =Al Magnetization M→= magnetic monent  Volume =( No.of turns )×( Current )× Area  Volume =NIAAl=NIl=500×15×10025=60×500=30×103=30000Am−1
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