GAP2_Exam3 - Name _---'-K-'--'E==-,'Ii--_ Physics...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Name _---'-K-'--'E==-,'Ii--_ Physics Department Duquesne University PH212-01 GAP II Exam #3 Apri128,2009 Read everything .YITY..,.carefully! This test covers Chapters 28 - 30. There are 5 multiple-choice questions worth 5 points each, and 5 long-answer questions worth 15 points each. There are 100 points possible. Partial credit will be given for the short answer questions, but only if you show your work and your reasoning is clear!!! 1. An electron (which is negatively charged) enters a region that contains a magnetic 'fi:el'd directed into the page as shown. The velocity vector ofthe electron makes an angle of 30 with the +y axis. What is the direction of the magnetic force on the electron when it enters the field? C -........--<--=- v' r-:-:- " )( 13 an "',nmi,"e' of600' above the positive x axis xxxxx X X X X X x X X X 2. "Which one ofthe following statements best explains why a constant magnetic field can do no work on a moving charged particle? a) The magnetic field is conservative. b) The magnetic force is a velocity dependent force. c) The rna eti' a scalar quantity. d), The magnetic fcirq~ ,is 'ilways perpendicular to the velocity,bfthe particle. : ': e) The electnc el assQciated with the partiCle cancels e e ec 0 e magnetic field on the particle. 3'. lri class, the erst~hil.e:,f>.hysi?s professor demonstrates how-a Spe~er works by atta~hirig , it to a radio and playing mll?ic. Name the hvo necessary ingredients ofthat speaker (apart from whatever is used for amplification; the radio is-not part of the speaker)....
View Full Document

This note was uploaded on 09/06/2010 for the course PHYS 211 taught by Professor Cohen during the Fall '10 term at Duquesne.

Page1 / 6

GAP2_Exam3 - Name _---'-K-'--'E==-,'Ii--_ Physics...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online