PhysSci - Charge & Electricity Review

Which term matches this description?

"The push behind charges (e-) causing them to move in a circuit"

• Voltage

• Current

• Resistance

• Inductance

Which term matches this description?

"The flow of charges (e-) moving in/through a circuit"

• Voltage

• Current

• Resistance

• Inductance

Which term matches this description?

"How difficult it is for charges (e-) to move through a circuit"

• Voltage

• Current

• Resistance

• Inductance

We discussed that when the Van De Graaff was turned on it delivers a bunch of electrons to the big sphere. Since there are a bunch of negative charges pushed into this space...

• The electrons (-) would be more strongly to the protons (+)

• The electrons (-) would be repelling each other

• The electrons (-) would be attracting each other

Tags

NGSS.HS-PS2-5

After a couple seconds of the Van De Graaff running, there is a high voltage between the sphere and the ground. Why?

• All the electrons on the sphere are repelling each other; the ground is a place they could get farthest from each other

• When current flows it makes a voltage appear due to the resistance of the charges

• The protons in the ground really want to be up on the sphere.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Why does the spark from the Van De Graaff jump several centimeters through the air when you get close... yet you can get super close to an outlet and there is no spark?

• The voltage for a household outlet is not as high as the voltage on the Van De Graaff

• The current isn't high enough in a household outlet to jump through the air

• The Van De Graaff has such a large resistance that charges can jump

Tags

NGSS.HS-PS2-5

Which attempt would light the bulb?

(look at the pictures carefully)

• B

• C

• D

• E

• None of the above

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

If an object has the same number of positive and negative charges, its electrical charge is...

• positive

• negative

• neutral or zero

• opposite

Angel touches a dome of Van de Graaff while standing on a plastic stool to insulate her from the ground. Her hairs stand upright because...

• Extra electrons from the Van de Graaff are trying to get out away from the sphere.

• Extra electrons from the Van de Graaff build up everywhere, including her hair, and since electrons repel each other, her hair strands repel each other.

• Touching the Van de Graaff makes air molecules want to get closer to the dome so they move through her body.

Tags

NGSS.HS-PS2-4

The flow of electrons (electricity) always flows from _____ areas to _____ areas.

• positive, negative

• negative, positive

• positive, neutral

• neutral, negative