1) The potential (relative to infinity) at the midpoint of a square is 3.0 V whe
ID: 1782526 • Letter: 1
Question
1) The potential (relative to infinity) at the midpoint of a square is 3.0 V when a point charge of +Q is located at one of the corners of the square. What is the potential (relative to infinity) at the center when each of the other corners is also containing a point charge of+Q? A) 0 V B) 3.0 V C) 9.0 V D) 12 V 2) A 2.0 nC positive point charge is located at point A in the figure. What is the potential at point B? 1.0 mB 30° A)36 V B)18 sin30 V C)18 cos30 V D)18 V 3) Which statements must be true about the surface of a charged conductor in which no charge is moving? (There could be more than one correct choice.) A) The electric field is zero at the surface B) The electric potential of the surface is zero C) The electric field is constant at the surface D) The electric potential is constant over the surface 4) Captain Hook is swimming underwater with a swim mask on. He encounters the crocodile. Does the crocodile appear closer or farther than it really is? Does the crocodile see Captain Hook's pale face closer or farther than it really is? A)Closer, closer B)Closer, farther C)Farther, closer D)Farther, farther E) The same, the sameExplanation / Answer
1) D) 12 V
Vnet = 4*V
= 4*3
= 12 V
2) D) 18V
V = k*Q/r
= 9*10^9*2*10^-9/1
= 18 V
3) C and D
4) A) closer, closer
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