HW 7.1: Static Electricity

What is static electricity?

• The movement of electrons in a conductor

• The build-up of charge on insulating materials

• The conversion of energy into electricity

• The continuous flow of electrons in a circuit

What causes a spark in static electricity?

• The rapid movement of protons

• The rubbing of two insulators

• The discharge of built-up electrons

• The presence of a magnetic field

What type of material allows electrons to move freely?

• Insulators

• Conductors

• Semi-conductors

• Plastics

Tags

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NGSS.HS-PS3-5

Why does a polythene rod become negatively charged when rubbed with a cloth?

• It gains electrons from the cloth

• It loses electrons to the cloth

• It gains protons from the cloth

• It loses protons to the cloth

Why can cars build up static charge?

• Due to the friction from the wind

• Because the tires can conduct electricity from the ground

• Because they are connected to power sources

• Due to the movement of fuel

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What is the charge on an object that has lost electrons?

• Negative

• Positive

• Neutral

• None of the above

What determines the direction in which electrons are transferred during friction?

• The speed of rubbing

• The mass of the objects

• The specific materials involved

• The temperature of the objects

Tags

NGSS.MS-PS2-3

Why do conductors not build up static charge easily?

• They have no electrons

• Electrons flow back freely

• They only contain protons

• They repel all charges

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What is a potential difference?

• A change in temperature

• A difference in voltage between two points

• A magnetic force between two objects

• A shift in electron mass

Why can you get an electric shock from touching a car?

• The car is generating electricity

• The car is releasing stored charge through your body

• The car is connected to a power source

• The car has too many protons

Tags

NGSS.HS-PS3-5