please solve 12 and 13 and explain the answers Two connected charged spheres - P

Question

please solve 12 and 13 and explain the answers

Two connected charged spheres - Potential and charge Troubleshooting Task Important concepts: A student considering this graph makes the following statement: "Since the two spheres are connected together, they will have the same electric potential and the charges on the surfaces of the spheres will he equal as well." Pairs of charged connected conductors The student's statement is not correct - identify any problem(s) and explain how to correct it/them. Charged spheres are assembled as shown, the larger ones are twice the radius of the smaller ones. The spheres on the left arc all charged to +20 nC and on the right to +70 nC before the switch in the middle is thrown. After the switch in the middle is closed (connecting the pairs of spheres) - rank the electric potential of each sphere: Greatest 1 2 3 4 5 6 Least Or - the electric potential is the same (but not zero) for all these Or - the electric potential is zero in all these Or - the ranking of the potential cannot be determined Be prepared to explain your reasoning

Explanation / Answer

here,

when the two spheres are connected by a conducting wire,

they will have the same electric potential but then the charge depends on the radius of the sphere,

both have equal charges if they are of same radius

13.

V = k * Q/r

when the switch is closed
,

the electric potential of A = potential of B

but as the radius is twice,

then the potential is less than that of C

potential of C and D is same and less than that of Eand F

potential of E and F are same but greatest

(Va = Vb) < ( Vc = Vd) < ( Ve = Vf)

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