2. 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 positron. In the same time t , the work done on the two moving charged particles is

Question

2. 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 positron. In the same time t , the work done on the two moving charged particles is, same as the same force law is involved in the two experiments, less for the case of a positron, as the positron moves away more rapidly and the force on it weakens, more for the case of a positron, as the positron moves away a larger distance, same as the work done by charged particle on the stationary proton.

MARKS App · Accepted Answer

Forces between two protons is same as that of between proton and a positron. As positron is much lighter than proton, it moves away through much larger distance compared to proton. Work done = Force × Distance As forces are same in case of proton and positron but distance moved by positron is larger, hence, work done on positron will be more than proton.

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