Circuits Flashcards
Name 3 types of charge.
Main 2 are Protons which is positive. Electrons which is negative. And leftover is Neutrons which is Neutral (0).
What happens when a positive and negative charge meet?
They Attract
What happens when a negative meet a negative. And positive meet positive.
They repel.
All materials are made of atoms but what 3 particles make atoms?
Protons, electrons, and Neutrons.
Why can you only lose and gain electrons?
Because they are outside while protons cant change because they are stuck inside.
What happens when you gain electrons?
The atom becomes negative because electrons are negative and you gained negatives.
What happens when you lose electrons?
The atom becomes positive because you lose negatives.
What is current?
The flow of charge around a circuit per second.
Units and measurement of current.
The unit is amps or amperes it is measured by an ammeter.
What happens at a closed and open switch?
A closed switch is on and An open switch is of.
What is another name for potential difference?
Voltage.
What is potential difference. (1)
The push
The bigger the p.d
.more force the current is moving with
.more energy can be transferred to the component
Units of p.d
measured in volts by a voltmeter.
What happens when p.d increases?
Current increases.
What is a series circuit?
All components form one loop, including the cell.
What is a parallel circuit?
It has More than one loop.
What happens in a series circuit?
Current is the same in a series circuit and p.d is shared.
What happens in a parallel circuit?
Current is shared and p.d is same.
What is Resistance?
The measure of how hard it is for the charge to flow.
What is resistance measured in?
Ohms. And resistance is given the symbol of omega.
The greater the resistance
the harder it is for the charge to flow and so lower current.
How to find the resistance?
p.d ÷ current = Resistance
How to find p.d?
resistance × current = p.d
How to find current?
pd ÷ resistance = current
Good conductors of heat
have low resistance like metals.
Poor conductor of heat
have high resistance like plastic.
high current
low resistance
Magnets
can be used to attract or repel other magnets
magnets can be used to attract other magnetic material.
What provides p.d?
Cell or battery
What pushes electrons around the circuit?
Cell or battery
