Electrostatics and Coulomb's Law

Which statement best explains why an inflated balloon rubbed against wool sticks to the wall? The balloon –

• generates a nuclear force.
• experiences a gravitational force.
• changes its magnetic field.
• becomes electrically charged.

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NGSS.MS-PS2-5

Which of the following changes will make an electromagnet stronger?

• Using more coils of wire around the core
• Using a weaker battery
• Removing the iron core
• Decreasing the electric current

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NGSS.HS-PS2-5

What is the magnitude of the force between the two charged spheres shown? Pay attention to µC. ex: 5.2 µC = 5.2x10^-6 or 0.0000052

• 1.6 N
• 1.4 N
• 1.2 N
• 1.0 N

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NGSS.HS-PS2-4

Which pair of charged spheres will exert the smallest force on each other?

• 
• 
• 
• 

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NGSS.HS-PS2-4

As two charged objects are moved closer together, -

• the force between the objects increases
• the forces between the objects decreases
• the charge on the objects increase.
• the charge on the objects decrease.

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NGSS.HS-PS2-4

A 5.4 x 10-6 C charge is located 2.2 m from a 2.3 x 10-6 C charge. What is the magnitude of the force being exerted on the smaller charge?

• .023N
• .85N
• 1.25N
• 2.55N

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NGSS.HS-PS2-4

Two negatively-charged metal spheres are being moved closer together. Which statement below best describes the force they exert on each other?

• The attractive force increases.
• The attractive force decreases
• The repulsive force increases
• The repulsive force decreases

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NGSS.HS-PS2-4

A charged object exerts a force on another charged object. If the charge on each object is doubled, the force becomes

• one-quarter of its original value.
• half of its original value.
• double its original value.
• four times its original value.

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NGSS.HS-PS2-4

If the distance between two charged spheres is halved, the force between the spheres is–

• decreased by a factor of 2.
• decreased by a factor of 4.
• increased by a factor of 2.
• increased by a factor of 4.

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NGSS.HS-PS2-4

A greater static force is generated when materials with a greater opposite charge are placed next to each other. Based on this information, and the information in the diagram shown, the greatest amount of static force will be generated using which two materials?

• Wool and vinyl
• Rabbit fur and silk
• Amber and vinyl
• Cotton and amber

Tags

NGSS.MS-PS2-3