Question

Due to earth's magnetic field charged cosmic rays; particle

• A. Requires more K.E to reach the equator than the pole
• B. Requires less K.E to reach the equator than the pole
• C. Can never reach the pole
• D. Can never reach equator

Answer 1

Answer: (A)

Requires more K.E to reach the equator than the pole

The earth's magnetic field is strongest at the poles hence cosmic rays of charges particles are deflected away from the equator. In order to reach the equator, they need to posses greater K.E since $F=Bqv$ and $K.E\alpha v$