Sir,
In the starting of lecture u made a graph between -9Q & +4Q of electric field and r .
I have no understood the graph possible for -ve electric field means below -9q and +4q
Area under yellow box
Sir, In the starting of lecture u made a graph between -9Q & +4Q of electric field and r . I have no understood the graph possible for -ve electric field means below -9q and +4q Area under yellow box JEE Advanced 2C17 Solutions yes ir easy ,e-tivatp Viliadrr..vs Go tc settin$&

Dear student

a)Whenever Electric field is directed towards the positive direction of x axis the graph is drawn above r axis and whenever Electric field is directed towards the negative  direction of x axis the graph is drawn below r axis .Now in the region consider any point P .The electric field due to -9Q at point P is towards left and the electric field at the same point due to +4Q is towards left .So as both the electric field in this region is directed towards left so the net electric is towards so the graph is drawn below r that is downwards.Regards

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it would be opposite 
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