An electron moves at a speed of 10000 m/s in
a circular path of radius 2.9 cm in a solenoid.
The magnetic field of the solenoid is perpen-
dicular to the plane of the electron’s path.
The permeability of free space is 4 ×
10−7 T · m/A.
Find the strength of the magnetic field in-
side the solenoid.
Answer in units of μT

please help me!!!!!!!!!!!!!!!!!!

Question

An electron moves at a speed of 10000 m/s in
a circular path of radius 2.9 cm in a solenoid.
The magnetic field of the solenoid is perpen-
dicular to the plane of the electron’s path.
The permeability of free space is 4  ×
10−7 T · m/A.
Find the strength of the magnetic field in-
side the solenoid.
Answer in units of μT

please help me!!!!!!!!!!!!!!!!!!

ujjwal · Answer

Use relation:$$Bev=\frac{mv^2}{r}$$where v is velocity of electron
e is charge of electron
m is mass of electron
r is radius of traced path
B is magnetic field