Electric Field Concept

If you walk into a region of space and suddenly feel a force, the space is said to contain a

• charged object.
• force field.
• large charge.
• black hole.
• heavy object.

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NGSS.HS-PS2-4

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An electric field has

• direction.
• magnitude.
• Both A and B

Every proton in the universe is surrounded by its own

• gravitational field.
• electric field.
• both A and B
• none of the above

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NGSS.HS-PS2-4

The direction of electric field lines shows the

• direction of the force on a test positive charge.
• size of the field.
• strength of the field.
• all of the above

Suppose a hollow metal sphere has a large negative charge on it. The electric field strength inside the sphere is

• large and positive.
• zero.
• weak and negative.
• weak and positive.
• large and negative.

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NGSS.HS-PS3-5

Suppose you touch a negatively charged object to a metal sphere so that electrons move from the charged object onto the sphere. After the charged object is moved far away, electrons on the sphere will be

• distributed in small bunches over the sphere's surface.
• distributed evenly over the sphere's surface.
• pulled off the sphere along with the charged object.
• located at the place where the charged object was.
• all of the above

Electrical potential energy is the energy a charged object has because of its

• momentum.
• location.
• mass.
• motion.
• volume.

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NGSS.HS-PS3-5

A small, positively charged object near a positively charged sphere is moved closer to the sphere. The electrical potential energy of the small object

• stays the same.
• decreases.
• increases.

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NGSS.HS-PS2-4

When an electron is brought near a negatively charged sphere, its potential energy increases. The reason this happens is that

• two like charges go from a position far apart to a position close together.
• negative charges repel each other.
• work was done to bring the charges together.
• none of the above

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NGSS.HS-PS2-4

NGSS.HS-PS3-5

If two negative charges are held close together and then released, the charges will

• accelerate toward each other.
• accelerate away from each other.
• not move.
• move at a constant speed away from each other.

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NGSS.HS-PS2-4

NGSS.HS-PS3-5