The electric field between the plates of a parallel-plate capacitor is horizontal, uniform, and has a magnitude e. asmall object with a charge of -2.16 μc is attached to the string. the tension in the string is 0.420 n , and the angle it makes with the vertical is 16 ∘.what is the mass of the object?

Explanation:

As we know that the small particle is in equilibrium at an angle of 16 degree with the vertical

so here we can use force balance in vertical and horizontal direction

now from above equation we have

also by division of above two equations we have

now from above equation again

small = small current large mag large current