Question 5

A proton with speed 3 × 10⁷ m/sec enters a region where the magnetic field is constant, 10 T south. If the proton is traveling west, how long will it take for the magnetic field to reduce its speed to zero?

• A. 1.04 × 10⁻⁹ s
• B. 3.00 × 10⁶ s
• C. It won't because protons are not affected by magnetic fields.
• D. It won't because the proton is going parallel to the field, so that magnetic force is zero.
• E. None of the above

Formula Sheet

Question 4

Question 6

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