Week 3 Solns

# Week 3 Solns - Electromagnetics Workshop – Week 3...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Electromagnetics Workshop – Week 3 Solutions Coulomb’s Law: Electrostatic Force, Electric Field Problem 1: Three point charges each with 3 q = [nC], are located at the corners of a triangle in the x-y plane, with one corner at the origin, another at (2 cm, 0, 0), and the third at (0, 2 cm, 0). Find the force acting on the charge located at the origin. 1 x y 3 2 1 Electromagnetics Workshop – Week 3 Solutions Coulomb’s Law: Electrostatic Force, Electric Field Problem 2: Two small, identical, electrically charged conducting spheres of mass 2.5 [g] and charge Q are suspended by weightless, non-conducting strings of length 12 [cm], as shown below. At equilibrium, the strings make an angle 30 θ = ° from vertical. What is the charge Q on each of the spheres? From the diagram, we can see that: sin θ = F T and cos m θ = = W g T . Hence we can write sin tan cos m m g θ θ θ = = F g . We also know that 1 2 12 12 2 ˆ 4 q q r π ε = F R , so 2 2 4 Q r π ε = F in this problem with 2 sin r l θ...
View Full Document

## This note was uploaded on 10/25/2011 for the course ECE 2317 taught by Professor Staff during the Spring '08 term at University of Houston.

### Page1 / 5

Week 3 Solns - Electromagnetics Workshop – Week 3...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online