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Unformatted text preview: x axis has a length of 0.500 m and a diameter of 0.200 mm. It is made of a material that obeys Ohm's law with a resistivity of = 4.00 108 m. Assume that a potential of 4.00 V is maintained at x = 0 and that V = 0 at x = 0.500 m. (a) (2 points) What is the resistance ( R ) of the wire? (b) (2 points)What is the electric current in the wire? (c) (2points) What is the current density in the wire? Express vectors in vector notation. a) b) c) ( ) ( ) ( ) 8 2 4 4.00 10 m 0.500 m 0.637 1.00 10 m R A  = = = l 4.00 V 6.28 A 0.637 V I R = = = ( ) 8 2 2 2 4 6.28 A 2.00 10 A m 200 MA m 1.00 10 m I A= = = = J i i i . Consider the system of capacitors shown in the figure ( C 1 = 3.00 F, C 2 = 4.00 F). (a) (2 points)Find the equivalent capacitance of the system. (b) Find the potential across each capacitor. (c) Find the charge on each capacitor. (d) Find the total energy stored by the group....
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 Fall '09
 WilfredNgwa
 Physics, Capacitance, Power

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