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Electric charges of  +10\mu C, +5\mu C - 3\mu C and +8\mu C are placed at the corners of a square of side \sqrt{2}m. the potential at the centre of the square is

  • Option 1)

    1.8 V

     

     

     

     

  • Option 2)

    1.8\times 10^{6}V

  • Option 3)

    1.8\times 10^{5}V

  • Option 4)

    1.8\times 10^{4}V

 

Answers (1)

best_answer

As we learned

 

Potential of a System of Charge -

V=\sum_{i=1}^{i=n}\frac{kQ_{i}}{r_{i}}

-

 

 Length of each side of square is \sqrt{2}m  so distance of it’s centre from each corner is \frac{\sqrt{2}}{\sqrt{2}}=1m

Potential at the centre

V=9\times 10^{9}\left [ \frac{10\times 10^{-6}}{1}+\frac{5\times 10^{-6}}{1}+\frac{3\times 10^{-6}}{1}+\frac{8\times 10^{-6}}{1} \right ]

=1.8\times 10^{5}V

 


Option 1)

1.8 V

 

 

 

 

Option 2)

1.8\times 10^{6}V

Option 3)

1.8\times 10^{5}V

Option 4)

1.8\times 10^{4}V

Posted by

Avinash

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