Which of the following is a correct statement? Potential difference between two
ID: 1655645 • Letter: W
Question
Which of the following is a correct statement? Potential difference between two points is defined to be equal to the change in a. electrical potential energy of an electron displaced between the two points. b. The potential at a point due to a point charge is inversely proportional to the square of the distance between the point and the charge. c. Electron Volt (eV) is a unit of measurement for potential difference. d. The unit of measurement for potential difference is the Vote. e. Electrical force is a non-conservative force. Two oppositely charged parallel plates are separated by a distance of 0.077 m. The strength of the electric field between the plates is 150 N/C. Calculate the work done by the electric force in displacing a (n) 8 C charge from the positive to the negative plate. a. 55.44 J b. 101.64 J c. 92.4J d. 110.88 J e. 120.12 J Two oppositely charged parallel plates are separated by a distance of 0.033 m. The strength of the electric field between thExplanation / Answer
1. POTENTIAL DIFFERENCE BETWEEN TWO POINTS IS DEfined as the potential energy change of a unit charge diplaced between these two points
hence the given statement is false
2. the electric potential due to a point charge q at ditace r is kq/r, and is not proportional to inverse of sqaure of r, so the statement is false
3. electron volt is a unit of energy so this statement is false too
4. unit of measure ment of potential difference is volt, so this statement is true
5. electrical force is a conservative force by natuire so this statement is false
2. oppositely charged parallel plates
plate seperation d= 0.077 m
electric field b/w plates E = 150 N/C
work done in displaceing 8 C = qV = qE*d = 8*150*0.077 = 92.4 J (option C)
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