A Conductor (shown in the figure) carrying constant current I is kept in the x - y plane in a uniform…

A Conductor (shown in the figure) carrying constant current I is kept in the x - y plane in a uniform magnetic field B→ . If F is the magnitude of the total magnetic force acting on the conductor, then the correct statement(s) is (are)

  1. If B→ is along z^ , F∝(L+R)
  2. If B→ is along x^ , F=0
  3. If B→ is along y^ , F∝(L+R)
  4. If B→ is along z^ , F=0

Solution

F→=I Displacement→×B→
As magnetic field is uniform
F→=I2L+2Ri^×B→
When B→ is along y or z axis
F∝L+R
When B→ is along x -axis
F=0 `

Asked in: JEE Advanced 2015 (Paper 1)

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