An electron moving at right angles to a 0.14 t magnetic field experiences an acceleration of 6.5×1015 m/ s 2 . what is the electron's speed? express your answer using two significant figures. by how much does its speed change in 1 ns( 10 −9 s) ?

, the speed does not change

Explanation:

The magnetic force on the electron is equal to the product between its mass and its acceleration:

where

q is the electron charge

v is the electron speed

B = 0.14 T is the magnetic field

m is the electron's mass

is the acceleration (centripetal acceleration)

Solving for v, we find

The speed of the electron does not change, because the acceleration is a centripetal acceleration, so it acts perpendicular to the direction of motion of the electron; therefore, no work is done on the electron by the magnetic force, and therefore the electron does not gain kinetic energy, which means that its speed does not change.

true is the correct answer

hope i

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