P3.1 - Static And Charge Flashcards
What type of materials/objects become charged?
Insulators
What is an insulated material?
An insulated material is one which doesn’t allow electrons to move through it.
What are fields?
Fields are a region within which objects experience a force.
What do gravitational fields, magnetic fields and electric fields exist around?
- Gravitational fields exist around anything with
mass. - Magnetic fields exist around anything with
magnetic properties. - Electric fields exist around anything with a charge.
What are lines used to represent?
Lines are used to represent the strength and direction of fields.
What does an electric field line direction indicate?
An electric field line direction indicates the direction a positive charge would follow.
What direction does an electric field line go?
Electric field lines leave positive charges and enter negative charges.
What do charged objects inside an electric field experience?
Charged objects inside the electric field of other charged objects experience an electrostatic force of repulsion or attraction.
When do charged objects inside an electric field repel/attract?
- Objects with the same charge in an electric field
(like charges) repel. - Objects with the opposite charge in an electric
field (unlike charges) attract.
What is electric current?
An electric current is the rate of flow of charge.
What is the charge on an electron?
-1.6 x 10-19C
What is the equation for electrical current?
- I=Q/t
- I = Current - A (amperes)
- Q = Charge - C (coulombs)
- t = time - s
What is conventional current?
The model where current flows from positive to negative, opposite to electron flow.
