ELECTRIC FIELDS

TRUE OR FALSE FALSE The mass of an electron is zero

When an object gains electrons it becomes positively charged TRUE OR FALSE FALSE When an object gains electrons it becomes positively charged

Conductors can’t become charged TRUE OR FALSE FALSE Conductors can’t become charged

TRUE OR FALSE Two plastic rods of the same material are charged, when held near each other they are attracted to each other FALSE

Only electrons can be transferred when an object becomes charged TRUE OR FALSE TRUE Only electrons can be transferred when an object becomes charged

VAN DE GRAAF GENERATOR

VAN DE GRAAFF GENERATOR Write the following statements in the correct order to create a flow chart: Electrons are transferred from the belt to the metal dome Initially, there is neutral charge everywhere Each strand of hair has a negative charge The belt is turned Her hair sticks up The dome becomes negatively charged Electrons are stripped from the iron wool to the belt The electrons flow from the dome, through the girl to her hair Like charges repel so each strand tries to get away from the others Now answer the following questions in your book: 1. Why does the girl stand in a plastic tray? 2. What will happen if someone shakes her hand? Why? Answer: b, d, g, a, f, h, c, i, e

ELECTRIC FIELDS Why do we see a spark?

ELECTRIC FIELDS A current flows between the positive dome and the negative rod. The current superheats the air causing a mini bolt of lightning.

These are examples of radial fields. ELECTRIC FIELDS The arrows indicate the direction a positive charge would move in the field. These are examples of radial fields.

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ELECTRIC FIELDS The arrows on the field lines always show the direction a positive charge feels a force This is a uniform field +

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Lightning

https://www.youtube.com/watch?v=jM8h60S1GsM https://phet.colorado.edu/en/simulation/legacy/electric-hockey