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A suspended object A is attracted to a neutral wall. It’s also attracted to a positively-charged object B. Which of the following is true about object A? (a) It is uncharged. (b) It has a negative charge. (c) It has a positive charge. (d) It may be either charged or uncharged.

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Rochelle Enrera
Rochelle EnreraLv10
28 Oct 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Four lightweight balls A,B,C and D are suspended by threads.
Ball A has been touched by a plastic rod that was rubbed with wool.
When the balls are brought close together, without touching, the
following observations are made:

1) Balls B, C and D are attracted to ball A.
2) Balls B and D have no effect on each other.
3) Ball B is attracted to ball C.

What are the charge states (positive, negative, or neutral) of balls
A, B, C and D? Explain your reasoning.

Can someone please help me solve this problem? Thanks in advance!!

This problem explores the behavior of charge on groundedconductors. We take as an example a long conducting rod suspendedby conducting wires that are connected to ground. Assume that therod is initially electrically neutral. For convenience, we willrefer to the left end of the rod as end A, and the right end of therod as end B . In the answer options for this problem, "stronglyattracted/repelled" means "attracted/repelled with a force ofmagnitude similar to that which would exist between two chargedballs."

A small metal ball is given a negative charge, then brought near(i.e., within about 1/10 the length of the rod) to end A of therod. What happens to end A of the rod when the ball approaches itclosely this first time?

strongly repelled
strongly attracted
weakly attracted
weakly repelled
neither attracted nor repelled

Now consider what happens when the small metal ball is repeatedlygiven a negative charge and then brought into contact with end A ofthe rod.

After a great many contacts with the charged ball, how is anycharge on the rod arranged (when the charged ball is faraway)?

positive charge on end B and negative charge on end A
negative charge spread evenly on both
negative charge on end A with end B remaining neutral
both ends neutral
positive charge spread evenly on both

How does end A of the rod react when the (re)charged ballapproaches it after a great many previous contacts with endA?

strongly repelled
strongly attracted
weakly attracted
weakly repelled
neither attracted nor repelled

How does end B of the rod react when the charged ball approaches itafter a great many previous contacts with end A?

strongly repelled
strongly attracted
weakly attracted
weakly repelled
neither attracted nor repelled



A physics teacher rubs a glass object and a felt cloth together and the glass becomes positively charged. Which of the following statements are true? Circle all that apply.

a. The glass gained protons during the rubbing process.

b. The felt became charged negatively during this rubbing process.

c. Charge is created during the rubbing process; it is grabbed by the more charge-hungry object.

d. If the glass acquired a charge of +5 units, then the felt acquires a charge of -5 units.

e. This event violates the law of conservation of charge.

f. Electrons are transferred from glass to felt; protons are transferred from felt to glass.

g. Once charged in this manner, the glass object and the felt cloth should attract each other.

h. In general, glass materials must have a greater affinity for electrons than felt materials.

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