Magnetism And Electricity Flashcards
Which of these materials are magnetic?:
Copper, paper, iron, glass, steel?
Iron and steel
What do we call each end of a magnet?
The poles (North and South).
How can you make two magnets repel each other?
Put two north poles together or two south poles together.
How can you make a electromagnet?
Connect a coil of wire to a battery, and pass electricity through the coil.
Name five uses of electromagnets.
In scrapyards, electric motors, doorbells, TVs, loudspeakers.
What things do you need to find the magnetic field around a magnet?
A plotting compass or iron filings.
For an electric current to flow we must have a complete ……….… with no ………… in it
For an electric current to flow we must have a complete circuit with no gaps in it.
What do we call materials which….
a) let electricity pass through them and
b) don’t let electricity pass through them
A) conductors, B) insulators.
Draw two circuits to show the difference between series and parallel circuits use one battery and two bulbs in each circuit.
please see the PDF on the iPad for the answers.
We think that tiny particles move through a wire when our electric current flows. What are the tiny particles called?
Electrons
What happens to a piece of thinwire when electricity is passed through it?
It heats up.
What do we use to measure the size of an electric current?
An ammeter
What unit still use when measuring electric currents?
Amperes (amps or a).
What do we call the safety device used in plugs? How does it work?
A fuse. It breaks (melts) went too much current flows through it. This breaks the circuits.
What do we use to measure the size of a push of a battery?
A voltmeter.
