A Particle (Q =-4 $\mu$ C, M = 50 Mg) Moves in a Uniform Magnetic Field with a Moves

question 21

Multiple Choice

A particle (q =-4.0 $\mu$ C, m = 5.0 mg) moves in a uniform magnetic field with a velocity having a magnitude of 2.0 km/s and a direction that is 50 $\degree$ away from that of the magnetic field.The particle is observed to have an acceleration with a magnitude of 5.8 m/s2.What is the magnitude of the magnetic field?

• A)5.3 mT
• B)4.9 mT
• C)5.1 mT
• D)4.7 mT
• E)3.6 mT

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