PHY 2054 Final Spring 2011 Key

PHY 2054 Final Spring 2011 Key - 77777 77777 Instructor(s...

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: 77777 77777 Instructor(s): Reitze/Kumar PHYSICS DEPARTMENT PHY 2054 Final Exam April 23, 2011 Name (print, last first): Signature: On my honor, I have neither given nor received unauthorized aid on this examination. YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE. (1) Code your test number on your answer sheet (use lines 76–80 on the answer sheet for the 5-digit number) . Code your name on your answer sheet. DARKEN CIRCLES COMPLETELY . Code your UFID number on your answer sheet. (2) Print your name on this sheet and sign it also. (3) Do all scratch work anywhere on this exam that you like. Circle your answers on the test form. At the end of the test, this exam printout is to be turned in. No credit will be given without both answer sheet and printout. (4) Blacken the circle of your intended answer completely, using a #2 pencil or blue or black ink . Do not make any stray marks or some answers may be counted as incorrect. (5) The answers are rounded off. Choose the closest to exact. There is no penalty for guessing. If you believe that no listed answer is correct, leave the form blank. (6) Hand in the answer sheet separately. Useful Constants: k e = 8 . 99 × 10 9 Nm 2 /C 2 ² = 8 . 85 × 10- 12 C 2 /(Nm 2 ) V=volt N=newton μ = 4 π × 10- 7 Tm/A k = μ / (4 π ) = 10- 7 Tm/A c = 3 × 10 8 m/s electron charge =- 1 . 6 × 10- 19 C electron mass = 9 . 11 × 10- 31 kg J=joule m=Meter “milli”=10- 3 “micro”=10- 6 n=“nano”=10- 9 “pico”=10- 12 C=coulomb g = 9 . 8 m/s 2 1. Two point particles, one with charge +8 . × 10- 9 C and the other with charge +2 . × 10- 9 C, are separated by 4 m. What is the magnitude of the electric field (in N/C) midway between them? (1) 13.49 (2) 22.48 (3) 9.99 (4) 5.99 (5) 5.62 2. Two point particles, one with charge +8 . × 10- 9 C and the other with charge +2 . × 10- 9 C, are separated by 6 m. What is the magnitude of the electric field (in N/C) midway between them? (1) 5.99 (2) 9.99 (3) 22.48 (4) 13.49 (5) 5.62 3. Two point particles, one with charge +8 . × 10- 9 C and the other with charge +2 . × 10- 9 C, are separated by 8 m. What is the magnitude of the electric field (in N/C) midway between them? (1) 3.37 (2) 5.62 (3) 13.49 (4) 9.99 (5) 5.99 4. Two equal and opposite point charges + Q and- Q are located on the y-axis at y = d and y = 0 as shown in the figure. What is the magnitude of the electric field at the point P on the x-axis a distance x = d from the origin? Note k e = 1 / (4 π² ). +Q d d- Q x-axis y-axis P (1) 0 . 737 k e Q/d 2 (2) 2 . 83 k e Q/d 2 (3) 1 . 41 k e Q/d 2 (4) 0 . 71 k e Q/d 2 (5) 0 . 383 k e Q/d 2 5. If the switch shown in the figure is closed at t = 0, how much energy is stored in the capacitor C (in μ J) at t = 10 ms? Assume that ² = 10V, R 1 = 100Ω R 2 = 500Ω and C = 10 μ F....
View Full Document

This note was uploaded on 10/13/2011 for the course PHY 2054 taught by Professor Avery during the Spring '08 term at University of Florida.

Page1 / 9

PHY 2054 Final Spring 2011 Key - 77777 77777 Instructor(s...

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