* + 7 21. Four charo placed at the ...
Question

* + 7 21. Four charo placed at the corners of a square. Which of the following stateme (1) Electric field is harges 2 C, -3 C, -4C and 5 C re statements is true for the point of and 5 C respectively are placed at the sic field is zero but electric potential is nonzero ont of intersection of the diagonals? ric field is nonzero but electric potential is zero Both electric field and electric potential are zero (3) Both ele (4) Neithere Jeither electric field nor electric potential is zero charges q and -40 are kont otential is zero?

JEE/Engineering Exams
Physics
Solution
165
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( vec{E}=sum k frac{q_{i}}{s_{i}^{2}} ) ( V=sum L frac{9 i}{x_{i}} ) So on summation of ( q rightarrow ) bhange ( 2+-3+-4+5=0 ) So coth ( vec{E} ) and ( 1 / ) is