In the figure above , three equipotential lines are drawn around a charge. Line A is at a potential of +5V, line B is at potential of 0V, and line C is at -5V?
a. Is the charge positive or negative? Explain.
b. A charge of 3 uC is placed on line C. How much work is required to move along line C for one circumstance, returning it to its starting point .
c. How much work is required to move the charge along line C for half the circumference?
a. Is the charge positive or negative? Explain.
b. A charge of 3 uC is placed on line C. How much work is required to move along line C for one circumstance, returning it to its starting point .
c. How much work is required to move the charge along line C for half the circumference?
1 Answer
Jun 26, 2018
(a). The charge is positive.
(b). Zero work done.
(c). Zero work done.
Explanation:
(a). The charge is positive, since potential decreases along the direction of electric field.
It means that the electric field lines of forces are originating from the particle, and so it must be positively charged.
(b). Work done in moving any charge in an equipotential surface is zero, which is the definition of the Equipotential Surface only.
(c). Same explanation as above.
