Magnetic field due to currentHard
Question
A disc of radius r and positive charge q is rotating with angular speed ω in a uniform magnetic field B about a fixed axis as shown in figure, such that angle made by axis of disc with magnetic field is θ. Torque applied by axis of the disc is
Options
A.
, clockwise
, clockwiseB.
, anticlockwise
, anticlockwiseC., anticlockwise
, anticlockwiseD., clockwise
, clockwise
ω ⇒ τ = 
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