Q: A 10 keV electron (mass = 9.1 × 10^-31 kg and charge = 1.6 × 10^-19 C) enters perpendicularly into the Earth’s magnetic field (5 × 10^-5 T). Its Larmor radius is
(a)5.93 km
(b)5.93 m
(c)6.75 km
(d)6.75 m
Correct Answer: (c)
The correct answer is (c): 6.75 km. Subject: General Science | Sub-topic: Physics - Electricity Note: This answer was determined through AI-based research. Verify against the official answer key when available.