The direction of the force on an electric charge in a magnetic field is
a. in the direction of the magnetic field.
b. in the direction of motion of the charge.
c. perpendicular to the magnetic field.
d. perpendicular to the direction of motion of the charge.
e. none of the above.
c, d
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a. Thermodynamics b. Geology c. Physics d. Chemistry
If the distance between two point charges is tripled while the size of the charges remains the same, the force between the charges is multiplied by
A. 9 B. 3 C. 1/3 D. 1/9.
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