2 point charges +2C +6C repel each other with a force of 12N . If a charge q is given to each of these charges then they attract with 4N. then q value is?
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Suraj Raman answered this
Force = K q1q2/r2
= K*2*6/r2=12
K/r2=1
Now, q charge is given,
K(2+q)(6+q)/r2=4
(2+q)(6+q)=4
12+8q+q2=4
8+8q+q2=0
So, the value of q = 4±22√
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Suraj Raman answered this
Force = K q1q2/r2
= K*2*6/r2=12
K/r2=1
Now, q charge is given,
K(2+q)(6+q)/r2=4
(2+q)(6+q)=4
12+8q+q2=4
8+8q+q2=0
So, the value of q = 4±22√
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Explanation: final answer comes in negative so negative means attraction
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