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In the above picture, I near positively rod to a neutral sphere. Then I ground the right side (negative side). Why electrons enter to sphere from ground?

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    $\begingroup$ Duplicate of : physics.stackexchange.com/q/492264/207455 $\endgroup$ – user207455 Jul 18 '19 at 16:55
  • $\begingroup$ in this situation i near positive rod to sphere. then negative side connect to ground.when connect negative side to ground, why electron go up. electrons repel each other. how this occur? $\endgroup$ – user3728644 Jul 18 '19 at 17:00
  • $\begingroup$ Did you mean that you bring the positively charged rod close to the neutral spere without actual contact? $\endgroup$ – user207455 Jul 18 '19 at 17:03
  • $\begingroup$ yes. then grounding right side( negative side). $\endgroup$ – user3728644 Jul 18 '19 at 17:04
  • $\begingroup$ Then you should clarify the question as it is difficult to follow. $\endgroup$ – user207455 Jul 18 '19 at 17:07
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When positively charged rod is brought near sphere all electrons come on side near the rod. other side then becomes positively charged. when the sphere is connected to ground electrons flow from ground to sphere to neutralize the positive charge.

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