Question

Figure shows tracks of three charged particles crossing a uniform electrostatic field with same velocities along horizontal. Give the sign of the three charges. Which particle has the highest charge to mass ratio?

A. A
B. B
C. C
D. A and B

Answer 1

Correct Answer - C
Particles A and B have negative charges because they are being deflected towards the positive plate of the electrostatic field. Particle C has positive charge because it is being deflected towards the negative plate.
`therefore" "` Deflection of charged particle in time t in y-direction
`h=0xxt+1/2at^(2)=1/2(qE)/mt^(2)" "i.e.,hpropq//m`
As the particle C suffers maximum deflection in y-direction, so it has highest charge to mass `q//m` ratio.