Electrostatics AP 1

The figure shows a neutral glass rod and a positively charged metal sphere.

Which of the following best describes the movement of charges as this glass rod touches the sphere?

• Protons move from the sphere to the glass rod.

• Electrons move from the sphere to the glass rod.

• Electrons move from the glass rod to the sphere.

• Protons move from the glass rod to the sphere.

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly
• decreases;inversely
• increases;inversely
• increases;directly

Approximately how much force would be generated by two charged objects held 2 m apart, if q₁ has a charge of 3.0 C and q₂ has a charge of 4.0 C?

• 4.3 x 10¹¹ N

• 5.4 x 10¹⁰ N

• 2.7 x 10¹⁰ N

• 1.5 x 10⁹ N

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the distance doubles?

• 4.8 N

• 1.2 N

• .6 N

• .3 N

In a neutral atom, there are more of which charge?

• there are more positive charges

• there are more negative charges

• there are equal amounts of both charges

• there are no charges in a neutral atom

The Law of Conservation of Charge states that

• charges can be created or destroyed but never transferred

• charges cannot be created or destroyed but also cannot be transferred

• charges can be created or destroyed and transferred

• charges cannot be created or destroyed only transferred

If an object has a net charge of +2e this means it has

• lost two electrons
• gained two electrons
• lost two protons
• gained two protons

An object with a charge of -2q is brought into contact with an identical object with a charge of +5q. The objects are then separated. Each object now has what charge respectively?

• +5q and -2q
• +3.5q and +3.5q
• +1.5q and -1.5q
• +1.5q and +1.5q

A 5 C and 8 C are 8 m apart. What is the force between them?

• 5.6 x 10⁹

• 5.6 x 10^-9

• 4.5 x 10¹⁰

• 4.5 x 10^-10

A charge of 4 C and -7 C are 200 m apart. What is the force between them?

• 6.3 x 10⁶

• -6.3 x 10⁶

• 2.52 x 10¹¹

• -2.52 x 10¹¹