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Question

A magnetic dipole of dipole moment 10(^i+^j+^k) is placed in a magnetic field 0.6^i+0.4^j+0.5^k, force acting on the dipole is :-

A
^i^j2^k
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B
^i+^j+2^k
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C
Zero
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D
None of these
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Solution

The correct option is A ^i^j2^k

Given that,

Dipole moment m=10(^i+^j+^k)

Magnetic field B=0.6^i+0.4^j+0.5^k

We know that,

The force is

τ=m×B

τ=(10^i+10^j+10^k)×(0.6^i+0.4^j+0.5^k)

τ=^i^j2^k

Hence, the force acting on the dipole is ^i^j2^k


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