Question

What is the velocity of a beam of electrons that goes undeflected when moving perpendicular to an electric and magnetic fields. E⃗ and B⃗ are also perpendicular to each other and have magnitudes 5900 V/m and 8.3×10−3 T , respectively.

Answer 1

Step-by-step explanation:

Electric field strength, E = 5900 V/m

Magnetic field strength, B = 8.3 x 10^-3 T

The magnetic force on the charge particle is balanced by the magnetic force on the charge particle which is moving with velocity v.

qE = q v B

v = E / B

`v =(5900)/(8.3* 10^(-3))`

v = 7.1 x 10^5 m/s