Circular Motion of Charges: A charged particle of mass 0.0040 kg is subjected to a 4.0-T magnetic field which acts at a right angle to its motion. If the particle moves in a circle of radius 0.10 m at a speed of 2.0 m/s, what is the magnitude of the charge on the particle?
A. 0.020 C
B. 50 C
C. 0.00040 C
D. 2500 C
Answer: A
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