(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

An electron (m= 9.11 x 10^-31 kg) enters a downward magnetic field of 5.00 x 10^-1 T with a velocity of 6.50 x 10^6 m/s West. Calculate the radius of the circular path it will follow when it is travelling within the magnetic field.

m = 9.11 x 10^-31 kg

v = 6.50 x 10^6 m/s West

B = 5.00 x 10^-1 T

q = -1.60 x 10^-19 C

2. Relevant equations

Fm = qvB

Fc = mv^2/r

Fm = Fc

3. The attempt at a solution

Fm = qvB

= (1.60 x 10^-19 C)(6.50 x 10^6 m/s)(5.00 x 10^-1 T)

= 5.2 x 10^-13 N

Fm = mv^2/r

r = mv^2/Fm

= (9.11 x 10^-31 kg)(6.50 x 10^6 m/s)^2 / (5.2 x 10^-13 N)

= 7.40 x 10^-5 m

I feel like I may have done this question wrong...

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Magnetic Field Problem!

**Physics Forums | Science Articles, Homework Help, Discussion**