Q.3 (a) Figure 3 shows a rod of length i which has a uniform positive charge per unit length a and a total charge q. It lies horizontally on the x- axis. Evaluate the electric field due to this rod at a point P on the x-axis if the near end of the rod is at a distance a from P. dx E Figure 3 (b) In Figure 4. a proton is released from rest at a point A in a uniform electric field that has a magnitude 8.0 × 10+ Vm. The proton undergoes a displacement of 0.5 m to a point B in the direction of E Find the speed of the proton after completing the 0.5 m displacement. Figure 4

Q.3 (a) Figure 3 shows a rod of length i which has a uniform positive charge per unit length a and a total charge q. It lies horizontally on the x- axis. Evaluate the electric field due to this rod at a point P on the x-axis if the near end of the rod is at a distance a from P. dx E Figure 3 (b) In Figure 4. a proton is released from rest at a point A in a uniform electric field that has a magnitude 8.0 × 10+ Vm. The proton undergoes a displacement of 0.5 m to a point B in the direction of E Find the speed of the proton after completing the 0.5 m displacement. Figure 4