P3.1 - Static and charge Flashcards
What can happen when insulating materials are rubbed together?
The can become statically charged
Why can insulators become electrically charged when rubbed together?
● Electrons are rubbed from one material onto the other.
● The material gaining electrons becomes negatively charged.
● The material losing electrons becomes equally
positively charged.
What is charging?
The addition or removal of electrons from a material.
How can charge be detected?
Using a gold leaf electroscope; the gold leaf is repelled by positive charge
What happens when two electrically charged objects
are brought close together?
They exert a force on each other.
What happens when two oppositely charged objects
are brought close together?
They exert attractive force on each other and attract
What happens when two identically charged objects are brought close together?
They exert a repulsive force on each other and repel
What is an electric field?
A region in which a charged object will experience a non-contact electrical force.
Describe the electric field around a charged particle
● Strongest closest to the object.
● Decreases in strength as you move away from the object
What is electrical current?
The flow of electrical charge
State the equation linking charge, current and time.
Give the units for the quantities involved.
Q = I t
Charge (Coulombs), Current (Amperes), Time (Seconds)
What can be said about the value of current at any point in a single closed loop?
Current is the same at all points in a closed loop.
