Lecture 3 1- 24-10

# Lecture 3 1- 24-10 - Lecture-3 Chapter 22 Electric Fields...

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3/26/10 Lecture-3 Chapter 22 Electric Fields Field: a spatial distribution of a physical quantity, e.g., the temperature field in Pennsylvania the magnetic field around the earth the electric field of a cell phone provider .

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3/26/10 In principle, we can define the electric field at some point near the charged object, such as point P in Fig. 22-1 a , as follows: We first place a positive charge q0 , called a test charge , at the point P . We then measure the electrostatic force that acts on the test charge. Finally, we define the electric field at point P due to the charged object as FIGURE 22- 1 (a) A positive test charge placed at point P near a charged object. An electrostatic force acts on the test charge. (b) ( b ) The electric field at point P produced by the charged object. The magnitude of the electric field at point P is , and the direction of is that of the force that acts on the positive test charge.
3/26/10 In the Verizon (or AT&T) language “how may bars are there?”. In Physics 22, you measure something call equipotential lines

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## This note was uploaded on 03/26/2010 for the course PHYS 021 taught by Professor Hickman during the Spring '08 term at Lehigh University .

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Lecture 3 1- 24-10 - Lecture-3 Chapter 22 Electric Fields...

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