The final torque on a coil having magnetic moment 25 A m2 in a 5 T uniform external magnetic field, if the coil rotates through an angle of `60^(@)` u

Question

The final torque on a coil having magnetic moment 25 A m2 in a 5 T uniform external magnetic field, if the coil rotates through an angle of `60^(@)` u

The final torque on a coil having magnetic moment 25 A m2 in a 5 T uniform external magnetic field, if the coil rotates through an angle of `60^(@)` under the influence of the magnetic field is
A. 216.5Nm
B. 108.25Nm
C. 102.5Nm
D. 258.1Nm

Monjur Alahi

9 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`|vec(tau)|=|vecmxxvecB|=mBsin theta`
Here, `m=25Am^(2),theta=60^(@),B=5T`
`therefore" "tau=25xx5xxsin 60^(@) or tau=125xx(sqrt3)/(2)=108.25" N m"`

9 views Answered 2023-02-05 15:29