Electricity And Magnetism - Spring Assesment Flashcards
example of mains
hairdryer, microwave, straightners, desk light
example of battery
Remote controller, torch, clock, laptop/phone
advantage and disadvantage of batteries
advantage: portable, reusable, easy to use
Disadvantage: can run out, bad for environment, acid and metal
What happens to positive and negative cells
If 2 identical cells are connected positive to positive or negative to negative, the voltage cancels out
What is the voltage value
1.5 - 1.5
0
Voltage value?
1.5 + 1.5 -1.5
1.5
Where is current in a series circuit
- current is the same everywhere
Where is the current in a parallel circuit
components have the same voltage
Current splits up between branches
What makes an electromagnet stronger?
wrapping a coil around it
Adding turns to coil
Increase current flowing through coil
What is an example of an electro magnet advantage over permanent magnets?
Can be turned on and off
What is an electromagnet
a type of magnetic field which can be produced by an electric current
Where are the voltmeters on a circuit
parallel across an electric component
In a series/parallel circuit what equals the voltage across cell/battery?
Series: total voltage across all components
Parallel: opposite, the voltage across different components is the voltage across the cell battery
What is the ammeter
Measure the amount of current flowing past a certain point, they are always connected
