Of the fundamental forces, the text claims that “gravity dominates on very large scales.” However, both...

Of the fundamental forces, the text claims that “gravity dominates on very large scales.” However, both the gravitational force and the electric force decrease in proportion to the inverse squared distance. Explain why the electric force isn't as strong as the gravitational force at very large distances.

Expert Solution

Electric forces arises due to both positive and negative charges. And if there is equal value of positive and negative charges, the net electric force becomes zero as these opposite type of charges will cancel each other out.

On the other hand, Gravitational forces result from only adding up mass of objects. Gravitational forces are a result of mass of the bodies under consideration. And unlike charges, there is no negative mass. Hence Gravitational force only adds up and doesn't get subtracted like Electric force.

At very large distances, there is a greater probability of finding equal number of positive and negative charges, so the net electric force either gets cancelled out or becomes negligibly small. But, Gravitational forces only add up due to mass being positive. Hence, they don' get cancelled out.

Therefore, Electric Force is not as strong as Gravitational Force over long distances.

genius_generous answered 1 year ago

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