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Question

# A bar magnet of length l, pole strength p and magnetic moment ′→m′ is split l/2 into two equal pieces each of length. The magnetic moment and pole strength of each piece is respectively _______ and _____

A
m,p/2
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B
m2,p/2
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C
m2,p
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D
m,p
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Solution

## The correct option is C →m2,pOn cutting a bar magnets in two pieces in this manner (i.e cutting perpendicular to its length), pole strength doesn't change.New pole strength =PNew magnetic moment=l2=→m2[In the question, symbol (standard symbol) used for magnetic pole strength and moment are exchanged and answer is given according to standard symbol]

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