Van de Graaff

When rubbing against the insulator what lose electrons?

• The belt

• The wand

• The Spark

• The metal comb

When rubbing against the conductor what gains electrons?

• The metal sphere

• The belt

• The metal comb

• The person touching the sphere

Which gains electrons when rubbed together?

• Conductor

• Insulator

Which loses electrons when rubbed together?

• Insulator

• Conductor

What charge was the sphere when the Vaan de Graaf was turned on (it was connected to the conductor).

• Positive (+)

• Negative (-)

What charge was the wand when the Vaan de Graaf was turned on (it was connected to the insulator).

• Positive (+)

• Negative (-)

Tags

NGSS.HS-PS2-4

Why was there a spark when the wand was brought close to the sphere?

• The excess electrons in the wand were attracted to the sphere.

• The excess electrons in the sphere were attracted to the wand.

• The excess electrons in the wand were attracted to the wand.

• The excess electrons in the sphere were attracted to the sphere.

Tags

NGSS.HS-PS2-4

The plastic step the teacher was standing on when touching the sphere is a good example of a strong ________

• Insulator

• Conductor

Why did a person feel a zap when the wand touched the sphere.

• All the extra electrons the built up on the person raced away from the person to neutralize the wand.

• All the lost electrons from the person raced back from the wand to neutralize the person.

Tags

NGSS.HS-PS2-4

Why did the tin plates jump off the Vaan de Graaf when it was turned.

• The plates become positive (+) like the sphere and were repulsed by the similar charge.

• The plates become positive (+) like the sphere and were repulsed by the opposite charge.

• The plates become negative (-) like the sphere and were repulsed by the similar charge.

• The plates become negative (-) like the sphere and were repulsed by the opposite charge.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5