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Question

Two positive charges of $$1\mu C$$ and $$2\mu C$$ are placed 1 m apart. the value of the electric foeld in N/C are the middle point of theline jioning the axis will be: 


A
10.8×104
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B
3.6×104
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C
1.8×104
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D
5.4×104
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Solution

The correct option is A $$10.8\times10^4$$

Two positive charges of $$1\mu C$$ and $$2\mu C$$
$${ F }_{ 1 }={ F }_{ 2 }$$  (According to coulomb's law)
or,  $$\dfrac { 1\times 9 }{ { \left( 0.5 \right)  }^{ 2 } } =\dfrac { 2\times 9 }{ { \left( 0.5 \right)  }^{ 2 } } $$
or,  $$9=10.8\times { 10 }^{ 4 }C$$

1238280_1184644_ans_5d95f8ccefa04badb1e9e82e44aaef13.jpg

Physics
NCERT
Standard XII

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