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Q: Which of the following property of a proton cannot change while it moves freely in magnetic field?
  • A. Speed
  • B. Velocity
  • C. Momentum
  • D. Both speed and velocity
Correct Answer: Option A - Proton is a permanent particle found in the atomic nucleus, which has a 1.6×10–19 coloumb of positive charge. There is no change in the speed of proton when moving in a magnetic field, it is noteworthy that "proton" was discovered by "Goldstein" but this particle was named by Rutherford.
A. Proton is a permanent particle found in the atomic nucleus, which has a 1.6×10–19 coloumb of positive charge. There is no change in the speed of proton when moving in a magnetic field, it is noteworthy that "proton" was discovered by "Goldstein" but this particle was named by Rutherford.

Explanations:

Proton is a permanent particle found in the atomic nucleus, which has a 1.6×10–19 coloumb of positive charge. There is no change in the speed of proton when moving in a magnetic field, it is noteworthy that "proton" was discovered by "Goldstein" but this particle was named by Rutherford.