2. Electricity Flashcards
What is current?
Current is the rate of the flow of charge. Amps = Coulombs / second
What is voltage?
Voltage is the energy difference between two points in a circuit.
How is current measured?
Current is measured by an Ammeter. It counts how many coulombs go past in a second. It is put into series.
How is voltage measured?
Voltage is measured by a voltmeter which needs to be connected at two points in the circuit.
What is an electrical conductor?
An electrical conductor is something that electricity can pass through.
What is an electrical insulator?
An electrical insulator is something that electricity can’t pass through.
What is resistance, and how does it affect the circuit?
Resistance is the measure of how difficult it is for current to flow. It can affect the circuit because it can change the current, this can make the current lower, and the wires hotter.
What is the equation for voltage?
Voltage = Current X Resistance
What is current measured in?
Amps - A
What is a series circuit?
A series circuit is where the current only flows through one path.
What is a parallel circuit?
A parallel circuit is where the current can flow through 2 or more paths.
What is the difference between series and parallel circuits?
Series has 1 route, whereas parallel has 2 or mor routes round a circuit.
How does current change in series and parallel circuits?
In a series circuit current is the same at all points whereas parallel circuit current isn’t the same at all points, if you add up the sum of the currents from all the different routes you will get the total current.
What is the relationship between current and voltage?
Voltage is current X resistance. If voltage increases but with a constant resistance then current’s change is proportionate to voltage’s change.
