P3 Electricity Flashcards
Like charges…
Repel
Opposite charges…
Attract
If there is a difference between the charges of two objects…
There is a potential difference between the two objects
Rubbing an object against another object can cause…
Electrons to jump from one object to another (both objects become charged)
A charged balloon can move water falling from a tap. Why is this?
The charge on the balloon attracts or repels the electrons in water
What is the result of a potential difference between two objects?
Rapid transfer of charge
Static electricity arises when…
This results in…
Electrons transfer from one object to another
One positively charged object and one negatively charged - there will be an electric field between the objects
Charged objects create ____ ____ around themselves
Electric fields
The direction of an electric field is…
The direction that a positively charged object would move at that point in the field
Two factors affect the strength of the electric field:
The closer an object is to the charged object, the stronger the field
The higher the charge of the object, the stronger the field
Current is…
The rate of flow of electric charge
For an electric charge to flow there are two essential factors:
Potential difference
Closed circuit
A ___ has ____ value at every point in a closed loop
Current
The same
Ammeters measure…
The flow of current that passes through it
Ammeters have to be connected in ____ (in the same loop of the circuit) with the electrical component whose current you are measuring
Series
