Explore BrainMass
Share

# Determine Electric Field & Calculate Speed of Electrons

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Please see attached file. For 1st problem, I used the formula:
E1= Kq1/r2 = (8.99 x 10^9 NM/C^2)(-6.75 x 10^-6 C)/ (2.45 x 10^2 m)^2
E1= -10.109 x 10^7 N/C which = -1.01 x 10^8? Is this right?

I had to convert r to p(d)from 24.5cm into m (scientific notation) -
Not sure if I converted it correctly? 24.5 cm = 2.45 x 10^2 m?

Then, resolved each electric field into x and y components:
E1 (for x) = (-1.01 x 10^8 N/C)(cos22) = -0.936 x 10^8 N/C ?

E1 (for y) = (-1.01 x 10^8 N/C)(Sin22) = 0.378 x 10^8?
Added both x values together, then both y values, then used Pythagorean theorem to solve for magnitude of electric field.

Have I done this correctly? Or am I mixed up? Please check for me and if wrong, explain where I went wrong and why. Also, don't understand how to graph the table in question 2 or how to calculate the speed of the electrons from accelerating potential.Please explain-I'm lost at this pt.

© BrainMass Inc. brainmass.com March 21, 2019, 7:45 pm ad1c9bdddf
https://brainmass.com/physics/equivalence-principle/determine-electric-field-calculate-speed-electrons-306156

#### Solution Preview

Hello and thank you for posting your question to Brainmass!
The solution is attached below in two files. the files are identical in content, only differ in format. The first is in MS Word format, while the other is in Adobe pdf format. ...

#### Solution Summary

This solution provides assistance to determine the electric field and calculate the speed of the electrons.

\$2.19