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# Speed for Circular Path

APPH12-T27WX1

An object with a charge of $+0.01\text{ C}$ and mass of $4\times { 10 }^{ -6 }\text{ kg}$ enters perpendicularly into a $2\text{ T}$ magnetic field.

If the field causes the object to move in a circular path with a radius of $2\text{ meters}$, what is the speed at which the object moves?

A

$8\times { 10 }^{ -8 }\text{ m/s}$

B

$1\times { 10 }^{ -4 }\text{ m/s}$

C

$2{,}500 \text{ m/s}$

D

$10{,}000 \text{ m/s}$