Gcse Physics Electricity Flashcards
What does a circuit consist of
Components
What is current
The flow of electrical charge around a circuit
What direction is conventional current.
Positive to negative terminal
How do components in ancient circuit get energy.
Electrons carry electrical energy from the cell or battery and transfer to components.
How do we measure current
Using an ammeter
What is a series circuit
No branches
Current flows in one direction in one pathway
What is the ammeter reading around a series circuit
The same at any point in the circuit
What is a parallel circuit
A circuit with branches
Current flows in different direction
What is a key feature of current in parallel circuits apart from branches?
The current leaving the cell is equal to the sun of the current in the different branches
What is potential difference
For every 1 volt, 1 joule of energy is transferred per coulomb of charge
If I have a voltmeter over a cell with 9 volts in series, and two lamps, what is the reading of the voltage across both lamp.
The total voltage of the lamps add up to the total voltage of the cell
What’s the rule for potential difference in series circuit
The potential difference is shared for each component and ads up to pd of the cel
What’s the rule for potential difference in a parallel circuit
The potential difference of a component in one branch is the same potential difference of components in another branch
What is a battery
Two or more cells connected together
What is important for a battery to work
The cells must be facing in the same direction
