Electric charges and force

A balloon is rubbed on a student's head. What occurs because of this?

• Charged particles on the balloon are destroyed

• Positively charged particles move from head to balloon

• Charged particles from the balloon are released into the air

• Negatively charged particles move from head to balloon

In the image shown spheres A and C are slowly moved closer to sphere B. Which of the following shows the most probable distribution of charge on sphere B?

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• 
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According to the inverse square law, as the distance between two charged surfaces is increased by a factor of three times the original value, the electrostatic force between the two charged surfaces should become

• 1/3rd original value

• 1/9th original value

• 3x original value

• 9x original value

According to the inverse square law, as the distance between two charged surfaces is increased by a factor of three times the original value, the electrostatic force between the two charged surfaces should become

• 1/3rd original value

• 1/9th original value

• 3x original value

• 9x original value

What it the unit of charge?

• Coulomb

• Ampere

• Volt

• Ohm

Which of the following equations represents Coulomb's Law?

• F= ^kQ/d²

• F = ^kQ₁^Q₂/_d²

• F = ^Q₁^Q₂/_d²

• F = ^kQ₁^Q₂/_d

If you increase the magnitude of two charges, what happens to the force between them?

• The force is less than before

• The force is more than before

• The force remains unchanged

What is the force between 10 C and 5 C charges placed 1 m apart?

• 4.5 x 10¹⁰ N

• 1.24 x 10⁸ N

• 4.5 x 10⁹ N

• 4.5 x 10¹¹ N

How can an object become charged?

• Conduction

• Induction

• Friction

• All of the choices

How does an atom become charged?

• By losing protons

• By gaining protons

• By losing or gaining electrons

• By losing neutrons