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Q.

Two positive charges separated by a distance 2m each other with a force of 0.36 N. If the combined charge is 26μC, the charges are

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a

20μC, 6μC

b

18μC, 8μC

c

16μC, 10μC

d

13μC, 13μC

answer is B.

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Detailed Solution

F=9×109q1q2r2⇒0.36=9×109q1q24q1q2=160(μc)2q1−q22=q1+q22−4q1q2=36(μc)2q1−q2=6μcq1+q2=26μcq1=16μc

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