12. An ionized helium atom has a mass of 6.6 x 10-27 kg and a speed of 4.4 x 105 m/s. It moves perpendicular to a 0.75-T magnetic field on a circular path that has a 0.012-m radius. Determine whether the charge of the ionized atom is +e or +2e.

 

Solve for q

 

 

 

Clearly the charge is +2e !

 

 

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This page last updated on June 21, 2018