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A piece of fabric 180 cm by 180 cm is spread out on a table. By rubbing it with a different material a charge of 33 μC is spread uniformly across the fabric surface a. What is the approximate field strength 6 cm above the center of the fabric? N/C b. What is the approximate field strength 18 cm above the center of the fabric? N/C

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o ua fia plane, Eude fits or Eluctrue abeve a. 33x1。 1.8mxI 8m 2 1. 9 36、668 x1 cm 36 . 666x10 xI. 2425

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