Difficulty: Hard

Average Score: 49%

Which of the following is true about the electrostatic forces of attraction between objects?

Rationale

Positively charged objects attract negatively charged objects.

Electrostatic forces operate on the principle that opposite charges attract while like charges repel. Therefore, a positively charged object will exert an attractive force on a negatively charged object, leading to interaction between these two types of charges.

A (Positively charged objects attract negatively charged objects.) CORRECT

This statement accurately reflects the fundamental principle of electrostatics, where opposite charges attract each other. The attraction occurs because the positive charge creates an electric field that influences the negative charge, pulling it closer.

B (Positively charged objects attract other positively charged objects.) YOUR ANSWER

This is incorrect because like charges repel each other. Two positively charged objects will push away from one another due to the repulsive electrostatic force that arises when their electric fields interact.

C (Positively charged objects and negatively charged objects attract neutral objects.) YOUR ANSWER

While it is true that positively charged objects can induce polarization in neutral objects, the statement implies a direct attraction between the charged and neutral object without acknowledging that the primary force is the attraction to the negatively charged component of the neutral object. This makes the statement misleading regarding the nature of the attraction.

D (Negatively charged objects attract other negatively charged objects.) YOUR ANSWER

Similar to choice B, this statement is false because like charges repel each other. Negative charges will repel one another, creating a force that drives them apart rather than attracting them.

Conclusion

In electrostatics, the interaction between charged objects is dictated by their charge types: opposite charges attract while like charges repel. The only correct assertion is that positively charged objects attract negatively charged ones, which is a fundamental concept in understanding electric forces. The misinterpretations in the other choices illustrate common misconceptions about charge interactions within electrostatic contexts.

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