23
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Unit Test — Unit test

Question 23 • Crowley Credit Recovery Physics B

What must be known to determine the direction of the magnetic force on a charge? Check all that apply.the type of the chargethe amount of the chargethe direction of the magnetic fieldthe velocity of the chargethe strength of the magnetic field

Answer
A
the type of the charge
B
the amount of the charge
C
the direction of the magnetic field
D
the velocity of the charge
E
the strength of the magnetic field

Explanation

The magnetic force direction follows the rule for the cross product of the charge’s velocity and the magnetic field: its direction depends on the velocity direction and the magnetic-field direction. The charge’s type also matters because a negative charge experiences force opposite the direction for a positive charge. The charge amount and field strength affect the force’s magnitude, not its direction.

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