# A charge of #2 C# is at the origin. How much energy would be applied to or released from a # 3 C# charge if it is moved from # ( -4, 0 ) # to #( -6 ,-3 ) #?

##### 2 Answers

#### Answer:

change in U = dU =

Therefore around 19.9 GJ has been released by moving the charge.

#### Explanation:

Electrical potential energy =

k = Coulomb's constant

change in U = dU =

Therefore around 19.9 GJ has been released by moving the charge.

#### Answer:

proceed as follows

#### Explanation:

Let the 2C charge is at origin O (0,0)

The initial position of 3C is at A (-4,0)

The final position of 3C is at B (--6,-3)

find distance OA,OB

find initial Pot Energy of the system when 3C is at A

then when at B using formula

calculate the difference ----Final - initial