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Q.

Two positive charges of 20 coulomb and Q coulomb are situated at a distance of 60 cm. The neutral point between them is at a distance of 20 cm from the 20 coulomb charge. Charge Q is

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a

80 C

b

30 C

c

40 C

d

60 C

answer is D.

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Detailed Solution

At neutral point

k×2020×10−22=k×Q40×10−22⇒Q=80C

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