PHYS 1302 Exam 2 REVIEW Sample Spring2024

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Texas A&M International University *

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1302

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Chemistry

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Feb 20, 2024

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docx

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PHYS 1302 – Exam 2 REVIEW SAMPLE Test Coverage: Chapters 18, 19 & partly 20 Test Instructions Exam 2 Schedule: OPENS at 12 am on Thursday, February 15 th and CLOSES at 11:59 pm on Friday, February 16 th (Time to test: 75 minutes maximum) Exam 2 Additional Instructions: >Use Lockdown Browser and Monitor (with microphone). >Take Exam 2 on Canvas under Modules Tab or Quizzes Tab or Assignments Tab. >Use dark lead pencil/pen and 1- 2 pcs white scratch paper for scribbling/showing work. NOTE: This REVIEW Material is NOT allowed while testing. >Use your own 1-2 pcs 4”x6” index cards as formula sheet. Both sides allowed. Prepare your formula sheet at least a day prior to the exam. > TI graphing calculator is allowed. Scientific calculator is also activated in Lockdown Browser usually located at the top left corner or top right corner in the test area. > No water or restroom breaks. No other electronic devices allowed while taking the test. This REVIEW MATERIAL is NOT allowed while testing. >Strong Suggestion -- Read the entire exam. Do the problems you know you can do first. Next do the problems you think you can do. Anything else is last. > Show complete work for the problems (FRQs) and then apply the rules of sig. fig. in your final answers. Submit your Exam 2 SHOW WORK at the designated drop box IMMEDIATELY after taking the test, for possible extra credits. I. Multiple Choice. Bubble in the letter of the best answer on your scantron. ( 2 pts @ ) ___1. Two resistors with values of 6.0 and 12.0 are connected in parallel. This combination is connected in series with 4.0 resistor. What is the equivalent resistance of this combination? a. 0.50 b. 2.0 c. 8.0 d. 22 ___2. Increasing the separation of the two charged parallel plates of a capacitor when they are disconnected from a battery will produce what effect on the capacitor? a. It will increase the charge. c. It will increase the capacitance. b. It will decrease the charge. d. It will decrease the capacitance. ___3. Changing the dielectric of two charged parallel plates of a capacitor from vacuum to mica will produce what effect on the capacitor? a. It will increase the charge. c. It will increase the capacitance. b. It will decrease the charge. d. It will decrease the capacitance.
___4. When electrons move through a metal conductor a. they move in straight line through the conductor. b. they move in zigzag patterns because of repeated collisions with the vibrating metal atoms. c. the temperature of the conductor decreases. d. they move at the speed of light in a vacuum. ___5. How does the potential difference across the bulb in a flashlight compare with the terminal voltage of the batteries used to power the flashlight? a. The potential difference is greater than the terminal voltage. b. The potential difference is less than the terminal voltage. c. The potential difference is (approx.) equal to the terminal voltage. d. It cannot be determined unless the internal resistance of the batteries is known. ___6. Which sentence best characterizes electric conductors? a. Charges on their surface do not move. b. They have high tensile strength. c. Electric charges move freely in them. d. They are not good heat conductors. II. Short answer. Use Kirchhoff’s rules (KR) to find the equations. 1. Using KR 1, what is the equation at the lower junction? 2. Using KR 2, what is the equation at the left loop?
III. Problem. Answer the following problems. Show COMPLETE and NEAT WORK ! No work, no credit. Write the equation(s)/solution/work, and answer(s) on the space provided for. Be sure to apply the rules of significant figures in your final answers. 1. (3 pts) Resistances in Series-Parallel : What is the equivalent resistance for the resistors in the following circuit? The left and right network of resistors are connected in the middle. Round final answer to 2 sig. fig. Equation(s)/Solution/Work: Answer:
2. (3 pts) Capacitances in Series-Parallel : The figure below shows 3 capacitors, of equal capacitance C = 8.2 microfarads = 8.2 x 10 -6 F, connected to a battery of voltage V. What is the equivalent capacitance of this combination? Round final answer to 2 sig. fig. Equation(s)/Solution/Work: Answer:
1. (6 pts) Resistors in Parallel: Three (3) resistors (R 1 = 2.50 , R 2 = 4.50 , and R 3 = 8.97 ) are connected in parallel to an operating or terminal voltage of 12.0 V. Determine the following: (a) R eq . (b) V 1 . (c) I 1 . V 2 . I 2 . V 3 . I 3 . I T . Round final answers to 3 sig. fig. Equation(s)/Solution/Work: Answer(s):
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