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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

What happens when a charged insulator is placed near an uncharged metallic object? (a) They repel each other. (b) They attract each other. (c) They may attract or repel each other, depending on whether the charge on the insulator is positive or negative. (d) They exert no electrostatic force on each other. (e) The charged insulator always spontaneously discharges.

To determine
The effect of placing a charged insulator near an uncharged metallic object.

Explanation

The charges on the insulator are static. The metallic object contains equal amount of positive and negative charges. When the charged insulator is placed near the metallic object, like charges are repelled and the unlike charges move towards the end closer to the insulator. The force of attraction exceeds the force of repulsion. This is because the unlike charges get accumulated in the end closer to the insulator

Conclusion:

The uncharged metallic object gets attracted when a charged insulator is placed near it due to accumulation of like charges in the end close to the insulator. Hence, option (b) is correct.

The force of attraction is much greater than the force of repulsion. Though, few charges present in the metallic object experience repulsive force, the attractive force dominates...

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