Electric potential at any point is : $V = -5x + 3y + \sqrt {15} z$ ; then the magnitude of electric field is :-
Electric potential at any point is : $V = -5x + 3y + \sqrt {15} z$ ; then the magnitude of electric field is :-
- A
$3\, \sqrt 2$
- B
$4\, \sqrt 2$
- C
$5\, \sqrt 2$
- D
$7$
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