This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: mcconnell (kam2342) oldhomework 05 Turner (60230) 1 This printout should have 8 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points An electron, starting from rest, is accelerated by a uniform electric field of 80000 N / C that extends over a distance of 6 cm. The charge and mass of an electron are 1 . 6 10 19 C and 9 . 11 10 31 kg respectively. Find the speed of the electron after it leaves the region of uniform electric field. Correct answer: 4 . 10617 10 7 m / s. Explanation: Let e = 1 . 6 10 19 C , m e = 9 . 11 10 31 kg , E = 80000 N / C , and x = 6 cm = 0 . 06 m . Because of the constant acceleration, v 2 = v 2 + 2 a x . Since v = 0 and a = F net m e = e E m e , v = radicalbigg 2 e E x m e = radicalBigg 2 (1 . 6 10 19 C) (80000 N / C) 9 . 11 10 31 kg . 06 m = 4 . 10617 10 7 m / s . 002 (part 1 of 3) 10.0 points An electron traveling at 4 10 6 m / s enters a . 08 m region with a uniform electric field of 287 N / C , as in the figure. The mass of an electron is 9 . 10939 10 31 kg and the charge on an electron is 1 . 60218 10 19 C . . 08 m + + + + + + + + + 4 10 6 m / s Find the magnitude of the acceleration of the electron while in the electric field. Correct answer: 5 . 04781 10 13 m / s 2 . Explanation: Let : q e = 1 . 60218 10 19 C , m e = 9 . 10939 10 31 kg , and E = 287 N / C ....
View
Full
Document
This note was uploaded on 11/22/2010 for the course PHYS 303 taught by Professor Turner during the Spring '10 term at University of Texas at Austin.
 Spring '10
 Turner

Click to edit the document details