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O is the centre of a negatively charged sphere - AQA - A-Level Physics - Question 13 - 2021 - Paper 2
Question 13
O is the centre of a negatively charged sphere. K and L are two points at a distance $r_1$ from O. M and N are two points at a distance $r_2$ from O. Which statem... show full transcript
Worked Solution & Example Answer:O is the centre of a negatively charged sphere - AQA - A-Level Physics - Question 13 - 2021 - Paper 2
Step 1
C No work is done moving an electron from M to N.
Answer
In a negatively charged sphere, the electric field produced is directed inwards. Since both points M and N are at the same distance from the centre O, there is no potential difference between them. Therefore, moving an electron from M to N results in no work being done, as the electric potential remains constant. Thus, the correct statement is:
C No work is done moving an electron from M to N.