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A thin "bar" magnet of length 'l' and ma...

A thin "bar" magnet of length `'l'` and magnetic moment `'M'` is bent at the mid point so that the two parts are at right angles. The new magnetic length and magnetic moment are respectively

A

`sqrt2l,sqrt2M`

B

`l/sqrt2,M/sqrt2`

C

`sqrt2l,M/sqrt2`

D

`l/sqrt2,sqrt2M`

Text Solution

Verified by Experts

The correct Answer is:
B
`M^(1)=M"sin"theta/2,2l^(1)=(2l)"sin"theta/2`
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NARAYNA-MAGNETISM AND MATTER-EXERCISE - 1 (C.W)
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  2. A bar magnet of magnetic moment M is bent in shape such that all the ...

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  3. A thin "bar" magnet of length 'l' and magnetic moment 'M' is bent at t...

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  4. Three magnets of same length but moments M,2M and 3M are arranged in t...

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  5. A "bar" magnet of moment M is cut into two identical pieces along the ...

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  6. A magnetic pole of pole strength 9.2Am. Is placed in a field induction...

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  7. The magnetic induction at distance of 0.1m from a strong magnetic pole...

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  8. If area vector bar(A)=3bari+2barj+5bark m^(2) flux density vector bar(...

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  9. P and Q are two unlike magnetic poles. Induction due to 'P' at the loc...

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  10. Two north poles each of pole strength m and a south pole of pole stren...

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  11. The pole strength of a horse shoe magnet is 90Am and distance between ...

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  12. The force acting on each pole of a magnet when placed in a uniform mag...

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  13. An iron specimen has relative permeability of 600 when placed in unifo...

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  14. A magnetic needle of pole strength 'm' is privoted at its centre. Its ...

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  15. Two identical "bar" magnets are jouned to form a cross. If this conbin...

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  16. A "bar" magnet of length 16 cm has a pole strength of 500 milli amp.m....

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  17. A "bar" magnet is at right angles to a uniform magnetic field. The cou...

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  18. A "bar" magnet of moment bar(M)=hat(i)+hat(j) is placed in a magnetic ...

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  19. A "bar" magnet of magnetic moment 1.5J//T is aligned with the directio...

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  20. The work done in turning a magnet of magnetic moment 'M' by an angle o...

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