Flashcards in Electricity And Magnetism Deck (48)
Units of measuring electric current in a circuit, the symbol is A
The flow of an electric charge (electrons) around a complete circuit per second
A region where there is a force on a magnet or magnetic material
A neutral particle. Everything is made from them
In a series circuit with multiple ammeters at different points in the circuit, do all the ammeters show the same reading?
Unit of measuring voltage, the symbol is V
The unit of resistance, symbol is greek O
A positive particle found in an atom
A current through the air that produces light and sound
Electrical device that uses current flowing through it in one circuit to switch on and off a current in a second circuit
A component or machine that spins when a current flows through it
A component that controls the current by making or breaking the current
A material that is attracted to a magnet, such as iron, cobalt, nickel
What is better about an electromagnet than a permanent magnet?
You can turn electromagnets on and off
You can make electromagnets that are much stronger than permanent magnets
In a parallel circuit with one ammeter on each path, is the total current shown on these ammeters? If not, how do you find the total current?
They don’t, you can find the total current by adding the values on the different ammeters, and you get the total current
A neutral particle found in atoms
Can electrons pass through insulators?
Two or more electrical cells joined together
Is wood a good conductor or insulator?
A circuit in which all components are joined in a single loop
A circuit in which there are two or more paths or branches for the current
Do conductors have high or low resistance?
How difficult it is for current to flow through a component in a circuit
A device for measuring electric current in a circuit
The charge on an electron, or on an object that has had electrons transferred to it
The pole of a magnet that points towards the north
A negatively charged particle found in an atom
The pole of a magnet that points towards the south
The charge on a proton, or on an object that has had electrons transferred from it
A region where a charged material or particle experiences a force
A temporary magnet produced using an electric current
The value of potential difference at which a cell or bulb operation
Be pushed away from each other, eg 2 positive charges
A measure of the push of a cell or a battery , or the energy that the cell or battery can supply
A material that does not conduct electricity or transfer energy well
Is a metal a good conductor or insulator?
Make into a magnet
Is the potential difference across each component in a parallel circuit the same as the potential difference across the cell? If not, how do you find the potential difference across the cell?
A rod of a magnetic material placed inside a coil to make the magnetic field of an electromagnet stronger
Is the potential difference across each component in a series circuit the same as the potential difference across the cell? If not, how do you find the potential difference across the cell?
No, to find potential difference across the cell add up the potential difference across each cell
Magnetic field lines
Imaginary lines that show the direction of the force on magnetic material
A measure of the strength of a cell or a battery used to send a current around a circuit
A property of a material or particle that can be negative or positive
A chemical store of energy, which provides the push that moves charge around a circuit
Be pulled together, eg north and south poles on magnets, negative and positive charges
How can you make an electromagnet stronger?
The number of turns of wire on the core. More turns of wire will make a stronger electromagnet
Increase the current flowing through the wire
The type of core. Using a magnetic material in the core will make a stronger electromagnet
A device for measuring voltage