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Mamont248 [21]
3 years ago
7

If an object with charge -3 nC moves from a location that has a potential of -20 V to a location with a potential of -10 V, what

has happened to the potential energy of the system?
Physics
1 answer:
enot [183]3 years ago
8 0

The potential energy decreases.

<u />

<u>Explanation:</u>

Given-

Charge of the object, q = -3nC

Initial potential, Vi = -20V

Final potential, Vf = -10V

Potential energy, U = ?

We know,

Potential, V = U/q

initial potential energy = Viq

                                                        = -20V X -3nC

                                                        = 60 nJ

Final potential energy = Vfq

                                     = -10V X -3nC

                                     = 30nJ

We can see that the potential energy decreases as the object moves from initial to final position which means that the work is done against the electric field.

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1 A 75-g ball is projected from a height of 1.6 m with a horizontal velocity of 2 m/s and bounces from a 400-g smooth plate supp
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