Chapter: Magnetic Fields due to Electric Current· Physics

Write the formula for torque acting on rotating current carrying coil in terms of magnetic dipole moment, in vector form.

Q.2 (iv) Write the formula for torque acting on rotating current carrying coil in terms of magnetic dipole moment, in vector form.

Doubtly Asked 29 Oct 2026 Board exam · March 2024 hsc 12th Save WhatsApp Report

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Answer: \(\vec{\tau} = \vec{m}\times\vec{B}\)

Here \(\vec{m} = NI\vec{A}\) is the magnetic dipole moment of the coil and \(\vec{B}\) is the magnetic field; the magnitude is \(\tau = mB\sin\theta\).

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Write the formula for torque acting on rotating current carrying coil in terms of magnetic dipole moment, in vector form.

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