In the figure, the arm PQ is moved from x = 0 to x = 2b with constant speed V. Consider the magnetic field as shown.
Write:-

  1. Direction of induced current in rod.
  2. Polarity induced in the rod..

Let,
PQ=SR=l

Magnetic flux,
φ=BA
Induced EMF,
ε=dφdt=dBAdt=BdAdt=Bdlvtdt=Blv
1. The direction of induced current is anti-clockwise.
2. Current will flow from Q to P, so P is + ve and Q is -ve.
 

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