NEET UG PHYSICS MCQ: MAGNETISM AND MATTER

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Application +4 | -1

If two identical bar magnets, each of length

l,

pole strength

m

and magnet moment

M,

are placed perpendicular to each other with their unlike poles in contact, the magnetic moment of the combination is

View answer and explanation

Correct option: B

lm\left( {\sqrt 2 } \right)

Option B (

lm\left( {\sqrt 2 } \right)

) is correct because the magnetic moments add vectorially, resulting in a net magnetic moment of

\sqrt{M^2 + M^2} = M\sqrt{2} = lm\sqrt{2}

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\vec A = 2\vec i - 3\vec j + 6\vec k\,{m^2}

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250\;joule

10\;kg

50\;Hz

7.5\;gm/c{m^3}

M

B