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Exam 2 with 6 Questions for Physics II | PHYS 251, Exams of Physics

Christian Brothers University (CBU)Physics

Material Type: Exam; Class: Physics II; Subject: Physics; University: Christian Brothers University; Term: Unknown 1989;

Typology: Exams

Pre 2010

Uploaded on 08/13/2009

koofers-user-xs6
koofers-user-xs6 🇺🇸

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Physics 251 Test 2 Name:
•Show all of your work.
•Read the entire exam before starting.
•Calculators are allowed on this exam.
1. For the collection of charges shown below,
(a) what is the potential at the point P?
(b) what is the potential energy stored in this collection of
charges?
pf3
pf4
pf5

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Download Exam 2 with 6 Questions for Physics II | PHYS 251 and more Exams Physics in PDF only on Docsity!

Physics 251 Test 2 Name:

  • Show all of your work.
  • Read the entire exam before starting.
  • Calculators are allowed on this exam.
  1. For the collection of charges shown below, (a) what is the potential at the point P? (b) what is the potential energy stored in this collection of charges?
  1. The power to your home is suddenly disconnected. You talk a neighbor into allowing you to plug an extension cord into their house. You power a 100 W at 120 V lightbulb so that you can see to complete your physics homework. The extension cord is 25 m long and has a pair of 16 ga ( 0 .00129032 m diameter) copper wires. (a) What is the resistance of the bulb at 120 V? (b) How much energy does the bulb use in 1 hour of time? (c) How much power is dissipated through the extension cord? (Assume that the potential difference across the bulb is 120 V.)
  1. A rod that carries a charge λd x is placed along the x − axis from x = 0 to x = l. Carefully set up and solve the proper integral to determine the potential at the point (0, y). What is the y component of the electric field at this point?
  1. For the circuit shown below, (a) how much current flows through each resistor? (b) how much voltage is across each resistor? (c) what is the equivalent resistance? (d) how much power does the battery supply to the circuit?