Categories > Electrostatics > electric-field-potential > Four identical charges $+ \,50\,\mu C$ each are placed, one at each corner of a square of side $2\,m$. How much external energy is required to bring another charge of $+ \,50\,\mu C$ from infinity to the centre of the square$\left( {{\rm{Given}}\frac{{\rm{1}}}{{{\rm{4}}\pi {\varepsilon _{\rm{0}}}}} = 9 \times {{10}^9}\frac{{N{m^2}}}{{{C^2}}}} \right)$

Electrostatics

Question: Four identical charges $+ \,50\,\mu C$ each are placed, one at each corner of a square of side $2\,m$. How much external energy is required to bring another charge of $+ \,50\,\mu C$ from infinity to the centre of the square$\left( {{\rm{Given}}\frac{{\rm{1}}}{{{\rm{4}}\pi {\varepsilon _{\rm{0}}}}} = 9 \times {{10}^9}\frac{{N{m^2}}}{{{C^2}}}} \right)$


1) $64\,J$
2) $41\,J$
3) $16\,J$
4) $10\,J$
Solution: Explanation: Explanation
electric-field-potential

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