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: 77777 77777 Instructor(s): Reitze/Kumar PHYSICS DEPARTMENT PHY2054 Exam 2 November 8, 2010 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 7680 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 = 8 . 85 10- 12 C 2 /(Nm 2 ) V=volt N=newton = 4 10- 7 Tm/A k = / (4 ) = 10- 7 Tm/A g = 9 . 8 m/s 2 electron charge =- 1 . 6 10- 19 C electron mass = 9 . 11 10- 31 kg C=coulomb milli=10- 3 micro=10- 6 n=nano=10- 9 pico=10- 12 J=joule m=Meter 1. A battery with an internal resistance of 0 . 5 is connected to a 10 resistor. If the voltage across the battery (the terminal voltage) is 20 Volts, what is the EMF of the battery (in Volts)? (1) 21 (2) 20 (3) 19 (4) 24 (5) 22 2. If V = 6 V and if the resistor R in the figure dissipates 12 W of power, what is R (in )? R V (1) 3 (2) 2 (3) 5 (4) 72 (5) 24 3. For what value of the resistor R will there be no current flowing through the 10 resistor shown in the figure? (HINT: If there is no current flowing through the 10 resistor, what is the potential difference between points A and B?...
View Full Document
This note was uploaded on 10/13/2011 for the course PHY 2054 taught by Professor Avery during the Fall '08 term at University of Florida.
- Fall '08