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NTSE Sample Paper NTSE SAT Practice Test-16

  • question_answer
    Two point charges \[+4\mu C\]and \[+2\mu C\]repel each other with a force of 8N. If a charge of- 4p.C is added to each of these charges, the force would be

    A) 4N                   

    B) 8N

    C) 12N                             

    D) zero

    Correct Answer: D

    Solution :

    [d] When we add \[-\text{ }4\mu C\]charge to each \[{{q}^{'}}_{1}=(4-4)\mu C\] = 0 \[{{q}^{'}}_{2}=(2-4)\mu C\] \[=-2\mu C\] As \[{{F}^{'}}\propto {{q}^{'}}_{1}{{q}^{'}}_{2}\] We have, \[{{F}^{'}}=0\]


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