A solid cold sphere is placed in an external electric field. Which of the follow

Question

A solid cold sphere is placed in an external electric field. Which of the following statements is true? A positively charged rod is brought near the top knob of a gold-leaf electroscope. They are not in contact with each other. Still, the leaves of the electroscope repel each other. What charge is on the leaves? Which of the following objects is positively charged: Which of the following charge configurations will NOT result in a zero electric field at the center (the shapes are: Equilateral triangle, squares and circle): A small metal-coated sphere is attracted to a negatively charged rod. What can you conclude about the sign of the charge on the sphere? Drawings 1 and 2 show two examples of electric field lines. Which of the following statements is true?

Explanation / Answer

8

a) Positive

when positive charged rod is brought close to the top knob , the negative charge comes closer at accumuate on the knob and the positive charge is repelled away and it accumulates on the leaves

9)

C)

10 )

d)

electric field by charges at diagonal are in the same direction and they do not cancel out . so there is net lectric field at the center   for squares

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