Q102 / 150 · MHT CET 2019 (Shift 2) · Physics

Torque acting on a rectangular coil carrying current ‘i’ situated parallel to magnetic field of current ‘i’ situated parallel to magnetic field of induction ‘B’, having number of turns ‘n’ and area ‘A’ is

  • A
    niA^.B^
  • B
    nBAi
  • Correct answer
    C
    niA×B
  • D
    iBAn

Solution

When a current carrying coil is placed in a magnetic field, the coil experienced a torque given by
τ=M×B
Where, M = magnetic moment = niA
∴τ=niA×B
Where, n = number of turns,
i = current flowing in coil
A= Area of coil

Hence, the correct answer is option: 'C'.

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