The Mystery of Purple Objects: Understanding Electromagnetic Force

[Amoghgirgaonkar]

Homework Statement

Please see the image in attempt

Relevant Equations

Please see the attempt

ans is opt4

 

[BvU]

Homework Equations:: Please see the attempt

Hello Amoghgirgaonkar, !

I don't see any equations and I don't see any attempt from you either.
PF rules don't allow us to assist in such circumstances !

 

[Amoghgirgaonkar]

Hello Amoghgirgaonkar, !

I don't see any equations and I don't see any attempt from you either.
PF rules don't allow us to assist in such circumstances !

If i do not know how to approach a question how can i write equations

 

[BvU]

Did you learn anything related with this exercise at all before you bumped into this exercise ?
What is the meaning of the purple thingies ? We try to be polite at PF !