A proton is kept at rest . A positively charged particle is released from rest at a distance d in its field .Consider two experiments , one in which the charged particle is also a proton and in another , a position . In same time t , the work done on the two moving charged particle is

Options

A. same as the same force law is involved in the two experiments
B. less for the case of a positron , as the positron moves away more rapidly and the force on it weakness
C. more for the case of a positron , as the positron moves away a larger distance
D. same as the work done by charged particle on the stationary proton .

Answer

C

Explanation

`F_("proton") =F_("positron")`
`d_("proton") lt d_("positron") " "( :. m_("proton" ) m_("positron"))`
` :. W_("proton") lt W_("positron") ( :. W = Fd)`