Review and section 18-1 Developing an Underlying Model to Account for the Observ

Question

Review and section 18-1 Developing an Underlying Model to Account for the Observations 18-6. A positively charged rod is brought toward two small conducting spheres suspended by insulating cords. Sphere A is attracted to the rod; sphere B is repelled by it. Indicate whether each of the following statements about the total charges on the spheres is definitely true, possibly true, or false: a. A is positively charged. b. B is positively charged. c. A is negatively charged. d. A is neutral. e. B is neutral. 18-7. SSM Suppose two objects A and B start out neutral, but when they are rubbed together, object A becomes negatively charged. a. If charge cannot be created or destroyed, where does A's charge come from? b. What is the effect of this on object B? c. Does a neutral object contain any positive charge? Does it contain any negative charge? Briefly explain

Explanation / Answer

18.6

b,c and d are right.

Reason

b)Two positive charges repel each other

c)opposite charges attract each other.

d)due to induction negative charge can induced in A.

18.7)

a)From B due to rubbing

b) B become positive charged

c) Neutral obect contains protons and equal number of electrons

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