03 - Electric Field I

# 03 - Electric Field I - Phys 212 - Fall 2009 8/26/2009...

This preview shows pages 1–6. Sign up to view the full content.

Phys 212 - Fall 2009 8/26/2009 Electric Field

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

View Full Document
Conductors A metal ball hangs from the ceiling by an insulating thread. The ball is attracted to a positive-charged rod held near the ball. The charge of the ball must be: 1) positive 2) negative 3) neutral 4) positive or neutral 5) negative or neutral
Proton vs. Electron A proton and an electron are held apart a distance of 1.0 m and then released. Which particle has the larger acceleration at any one moment? p e 1) proton 2) electron 3) both the same 4) not enough information

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

View Full Document
Charges in a plane Determine the magnitude and direction of the net electrostatic force on q 1 . Step 1. Determine individual forces on q 1 and draw free body diagram (Note the coordinate system) q 2 attracts q 1 - F 12 q 3 attracts q 1 - F 13 Force F 12 has x and y components!
Charges in a plane F 12 = k | q 1 || q 2 | r 12 2 = (8.99 E 9 Nm 2 / C 2 ) (4.0 E 6 C )(6.0 E 6 C ) (0.15 m ) 2 = 9.6 N F 13 = k | q 1 || q 3 | r 13 2 = (8.99 E 9 Nm 2 / C 2 ) (4.0 E 6 C )(5.0 E 6 C ) (0.1 m ) 2 = 18 N Step 2. Determine magnitude of individual forces on q 1 F 12 = (9.6 N )cos(73 ° ) ˆ i

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.

## This note was uploaded on 10/03/2011 for the course PSYC 212 taught by Professor Ilieva during the Fall '09 term at South Carolina.

### Page1 / 15

03 - Electric Field I - Phys 212 - Fall 2009 8/26/2009...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online