Figure shows the tracks of three charged particles in a unform electrostatic field projected parallel to a plate with the same velocity. Give the signs of the three charges. Which of the three charges. Which of the three particles has the highest charge-to-mass ratio?

Explanation

(1) and (2) are negative while (3) is positive.
Acceleration of each particle is
`a=(qE)/(m)`
Deflection suffered by a particle is
`y=ut+(1)/(2) at^(2)=0+(1)/(2)(qE)/(m)t^(2)` or `y prop(q)/(m)`
Hence, (3) will have the highest `q//m` ratio.