Two protons A and B move parallel to the...

Two protons A and B move parallel to the x-axis is opposite directions with equal speed v. At the instant shown, the ratio of magnetic force and electric force acting on the proton A is (c=speed of light in vacuum)

`v/c`

`(v^(2))/(c^(2))`

`(vd^(2))/c`

`(2v)/c`

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