Is number 6: V/2?? Also what is number 7? Chrome File Edit View History Bookmark

Question

Is number 6: V/2??

Also what is number 7?

Chrome File Edit View History Bookmarks People Window Help 6) % 4)) 9496 H. Mon 2:03 AM a E D Qualitative Lo Qualitative Look at Chegg.com S MasteringPhysics: C x / ElectricPotentialAnc × y 'KGaussLaw-PHYS-2 x G electric field equatio : × Gauss's Law and N x https://learn.ou.edu/d2l/le/content/21181 03/viewContent/3391 199/View?ou-21 18103 hMy Home Tanner Calloway 6. The electric potential a distance d away from a point charge is V. The electric potential a distance 2d from the same point charge will be: (b) V/2 (c) 2V (d) V/4 (e) 4V 7. A system of charges has an electric potential given by V()C/z3 along the a axis, where C is a constant What is the electric field along the x axis? (a) You can't say anything until you know more about the charge configuration 8. Consider three charges each of +2 d in a line with a separation of 6 m between them, what is the potential energy of the system? (a) 1 kJ (b) 2 kJ (c) 2.25 kJ (d) 3 kJ (e) 5 kJ (f) 6 kJ (g) 9 kJ (h) 12 kJ

Explanation / Answer

6) electric potential (V) = k*Q / d

and for the same point charge if 'd' becomes '2d'. Hence, V' = k*Q / (2*d) = V/2.

7) electric potential is given as a function of x along the x axis: V(x) = C/x3

We know dV/dx = -E i

therefore E = - d(C/x3) /dx i = -1 * -3*C / x4  i = 3*C/x4  i.

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