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Two pitch balls each of mass 1g and carrying a charge of 1 mC are attached to the ends of silk threads 1 m long, the other ends of which are attached to some fixed point, in a gravity free space. The force between them is (a) 9.8´ 10-6 N (b) 9.8 ´ 10-12 N (c) 2.25 ´ 10-3 N (d) 4.5 ´ 10-6 N


Two pitch balls each of mass 1g and carrying a charge of 1 mC are attached to the ends of silk threads 1 m


long, the other ends of which are attached to some fixed point, in a gravity free space. The force between


them is


(a) 9.8´ 10-6 N (b) 9.8 ´ 10-12 N (c) 2.25 ´ 10-3 N (d) 4.5 ´ 10-6 N


Grade:11

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