P3.1 Flashcards
Only ____ materials can becoming charged
Insulated
What direction do field lines go to and from
From positive to negative
When do charged objects experience a force
Charged objects inside the electric field of other charged objects experience a force
ELECTROSTATIC FORCE OF ATTRACTION OR REPULSION
Explain why you may get an electric shock if you walk in a nylon carpet and then touch a metal radiator
While walking on the carpet there will be two insulators (shoes and carpet) rubbing each other
Consequently, electrons will get transferred in between the shoes and the carpet leaving behind charged ions (positively or negatively)
The more they rub the more the static electricity builds up and when we touch a metal, which is a conductor, electrons will move to the Earth (current) and we will feel an electric shock.
Battery
Cell
Switch
Lamp
Diode
LED
Ammeter
Resistor - fixed resistor
Variable resistor
Fuse
Heater
Voltmeter
Light dependent resistor
Thermistor
Define electric current
Rate of flow of charge
Current formula
Which way does the diode face
Arrow faces towards negative
As current flows from positive to negative
Is the big line or the little line the positive terminal in a battery / cell
How does lighting form
In a storm, clouds move over each other
This causes them to become charged when electrons are transferred between them
Since the ground is neutral, the negative charges from the cloud jump to meet the positive charges on the ground creating a giant spark (a current from a transfer of charge)
This phenomenon is known as lightning
What is an electric field
a region where charges experience a force
