Which images in figure 2 are due to ray which have reflected off of two mirrors?

Question

Which images in figure 2 are due to ray which have reflected off of two mirrors? (A) 11 and 14 (B)12 and 13 (C) 11 and 13 (D) 12 and 14 Three identical metal balls are each given a different electric charges. Ball A has an initial charge of +10.0nC. ball B has an initial charge of -30.0 nC, and ball C has an initial charge of-200 nC The three balls are pushed together in a line with ball B in the middle. While pushed together charges can move between all balls. All the balls are separated at the same time. What is the charge on ball B? (A)+40.0 nC (B) -13.3 nC (C) -40.0 nC (D) +13.3 nC (E) a very small negative charge

Explanation / Answer

A. I1 and I4

B). Sum of charges/3=10-30-20/3= -40/3=13.3 ncWhen cconductors are brought together they will spread out as if a single conductor and when separated they will have equal charge.

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