Consider two charged plates as shown below. Two points (A and B) are marked. Let
ID: 1589351 • Letter: C
Question
Consider two charged plates as shown below. Two points (A and B) are marked. Let’s say a charge q is moved from point A to point B. Which of the following statements are true (two correct answers)
a) If q is positive, its potential energy increases
b) If q is positive, its potential energy decreases
c) If q is negative, its potential energy increases
d) If q is negative, its potential energy decreases
Consider the diagram above. Your friend says “The work done in moving a test charge from A to B is more than the work done in moving the same charge from A to C”. Do you agree with this statement? Justify your answer.
What is the work done in moving a charge from B to C? Justify your answer. Does this value depend on whether the charge that is being moved is positive or negative?
Explanation / Answer
Since, positive charge repelled by the positive plate and attracted by negative plate, so, it moves from A to B, its potential energy decreases.
Therefore, the correct option is b
No, I do not agree with that. Work is scalar, and considers only initial and final positions. B and C are in same level so, the work done is same.