Magnetic field is present in region between circles having radii R and 2R B 7t 4 T t in sec How much work in J has to be done to

Question

Magnetic field is present in region between circles having radii R and 2R B 7t 4 T t in sec How much work in J has to be done to displace a particle having charge q 200 mC from 1 to 2 as shown in figure xx X X X 2 0 0 5 radian R 2m

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