An electron is moving through a magnetic field. if the velocity of the electron is doubled, then

Force is doubled

Explanation:

Given

Speed of Electron is doubled then

According to Lorentz theory Force experienced by Charge particle in a magnetic field

where q=charge on particle

v=velocity of particle

B=magnetic Field

Supposing Magnetic Field is Perpendicular to Velocity thus

Force on particle will be doubled

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.