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by: Loraine Bauch II

CollegePhysics PHY123

Loraine Bauch II
CSU Pomona
GPA 3.71


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Class Notes
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This 2 page Class Notes was uploaded by Loraine Bauch II on Saturday October 3, 2015. The Class Notes belongs to PHY123 at California State Polytechnic University taught by SidiBenzahra in Fall. Since its upload, it has received 24 views. For similar materials see /class/218360/phy123-california-state-polytechnic-university in Physics 2 at California State Polytechnic University.

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Date Created: 10/03/15
Instructor Dr Benzahra Physics 133 Review for Exam 1 Date May 7 2010 1 A certain charge Q is divided in two parts q and Q iq which are then seperated by a certain distance What must q be in terms of Q to maximize the electrostatic repulsion between the two charges Show your work 2 Two free particles that is free to move with charges 01 and 4q are a distance L apart A third charge is placed so that the entire system is in equilibrium Find the location magnitude and sign of the third charge 3 Consider de ecting plates of an ink jet printer with superimposed coordinate axes An ink drop with a mass m of 13 gtlt 10 10 kg and a negative charge of magni tude Q 15 gtlt 10430 enters the region between the plates initially moving along the x axis with speed 111 18ms The length L of the plates is 16 cm The plates are charged and thus produce an electric eld at all points between them Assume that eld E is downward directed uniform and has a magnitude of 14 gtlt 106 NC What is the vertical de ection of the drop at the far edge of the plates Ignore gravitation Instructor Dr Benzahra Physics 123 Review for Test 2 February 77 2011 1 Earth7s atmosphere is constantly bombarded by cosmic ray protons that originate somewhere in space If the protons all passed through the atmosphere7 each square meter of Earth7s surface would intercept protons at the average rate of 1500 protons per second What would be the corresponding electric current intercepted by the total surface area of the planet Answer 122mA 2 An electron is accelerated from rest by a potential difference of 350 V It then enters a uniform magnetic eld of magnitude 200 mT with its velocity perpendicular to the eld Calculate a the speed of the electron and b the radius of its path in the magnetic eld Answers a v111 gtlt 107 ms b r316 gtlt10 4 m 3 A coil is connected in series with a 100kQ resistor A 500 V battery is applied across the two devices7 and the current reaches a value of 200 mA after 500 ms a Find the inductance of the coil b How much energy is stored in the coil at the same moment Answer a L 979H bUB 0196mJ


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