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Q.

Two equal and opposite charges of magnitude 0.2 μC are 15 cm apart, the magnitude and direction of the resultant  electric intensity at a point midway between the charges is:

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a

zero

b

6.4 × 105 N/C towards –ve charge

c

6.4 × 105 N/C towards + ve charge

d

infinity

answer is A.

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Detailed Solution

E1+E2=2E1 or 2E2 Towards (-ve) charge 2E1=2×14πεo0.2×10−6152×10−22=2×9×109×0.2×10−67.5×10−222E1=6.4×105 N/C

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