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Question

Choose the correct forces responsible for below.
a. After combing hair when you bring your comb near pieces of paper it attracts them.
b. Moon revolving around the Earth.

A
Electrostatic force, Gravitational force
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B
Electrostatic force, Electrostatic force
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C
Gravitational force, Electrostatic force
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D
Gravitational force, Gravitational force
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Solution

The correct option is A Electrostatic force, Gravitational force
After combing hair, the comb acquires electrostatic charge and it attracts the paper pieces. Therefore, electrostatic force is responsible for the attraction.

Every object in the universe, having mass, exerts a gravitational force on every other object having mass. So, we can say that gravitational force acts between Moon and Earth.

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