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1. |
A proton enters a magnetic field of flux density 5 T with a velocity of 5 × 107 ms-1 at an angle of 30o with the field. Find the force on the proton. |
A. | 0.2 × 10-11 N |
B. | 2 × 10-11 N |
C. | 20 × 10-11 N |
D. | 200 × 10-11 N |
Answer» C. | |