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MHT CET20244 May 2024Morning ShiftPhysicsMagnetic Effects of CurrentActual

A massless square loop of wire of resistance ' R ' supporting a mass ' M ' hangs vertically with one of its sides in a uniform magnetic field ' B ' directed outwards in the shaded region. A d.c. voltage ' V ' is applied to the loop. For what value of ' V ' the magnetic force will exactly balance the weight of the supporting mass ' M '? (side of loop = L , g = acceleration due to gravity)

Options

  1. AMg LBR
  2. BLB MgR
  3. CMgR LB
  4. DLR MgB

Correct answer

C. MgR LB

Step-by-step solution

array ll & F = Mg & BIL = Mg & According to Ohm's law, V = IR & B ( V R ) L = Mg & V = MgR BL array

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