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Unformatted text preview: r is slid between the plates and is withdrawn until only a length x remains between the plates as shown below. Show that the force tending to restore the slab to its original position is: ( ) d aV F r 2 1 2 = =45 o 50V gap V x=0 x=d V 0 x l F d EE1259: Electromagnetic assignment 2 4. A spherical capacitor has an inner conductor of radius a carrying charge Q and maintained at zero potential. If the outer conductor contracts from a radius b to c under internal forces, prove that the work performed by the electric field as a results of the contraction is ( ) bc c b Q W 8 2 = 5. A metal bar with conductivity is shown in the figure below, with an inner radius of a , the outer radius of b , and thickness of t , Find R between the vertical surface at =a and =b...
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This note was uploaded on 04/10/2008 for the course ECE 1259 taught by Professor Chen during the Spring '07 term at Pittsburgh.
- Spring '07