- #1

jehan60188

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- 1

## Homework Statement

A long solenoid has 100 turns/cm and carries a current i. An electron moves within the solenoid in a circle of radius 0.022 cm perpendicular to the axis of the solenoid. The speed of the electron is 0.048c (c is the speed of light).

## Homework Equations

f = m*v^2/r = q*v*B

B of a solenoid = u*n*I

where n = number of turns per meter

u = 4*pi*10^7

## The Attempt at a Solution

so B = mv/(r*q) = u*n*I

I = mv/(r*q*u*n)

I = 5436.9 is not correct