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Two similar spheres having +q  and -q  charge are kept at a certain distance. F  force acts between the two. If in the middle of two spheres, another similar sphere having  +q charge is kept, then it experience a force in magnitude and direction as

  • Option 1)

    Zero having no direction

  • Option 2)

    8F  towards  +q charge                  

  • Option 3)

     8F towards -q  charge

  • Option 4)

    4F  towards +q  charge

 

Answers (1)

best_answer

As we learned

Principle of Super Position -

It states that total force acting on a given charge due to number of charges is the Vector sum of the individual force acting on that charge due to all the charges.

- wherein

 

 Initially, force between A and C F=k\frac{Q^{2}}{r^{2}}

When a similar sphere B having charge +Q iskept at the mid point of line joining A and C, then Net force on B is

F_{net}=F_{A}+F_{C}=k\frac{Q^{2}}{(r/2)^{2}}+\frac{kQ^{2}}{(r/2)^{2}}=8\frac{kQ^{2}}{r^{2}}=8F.

 


Option 1)

Zero having no direction

Option 2)

8F  towards  +q charge                  

Option 3)

 8F towards -q  charge

Option 4)

4F  towards +q  charge

Posted by

prateek

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