Magnetic force on moving charge:
Earth's field, B = 50 × 10-6 T
(a) A physicist performing a sensitive measurement wants to limit the magnetic force on a moving charge in her equipment to less than
1.00×1012 N. What is the greatest the charge can be if it moves at a maximum speed of 30.0 m/s in the Earth s field?
(b) Discuss whether it would be difficult to limit the charge to less than the value found in (a) by comparing it with typical static electricity and noting that static is often absent.
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