The rate of flow of charge across conductor
is called Electric Current.
The unit of current is Ampere.
The
path of flow of charges is called electric circuit.
The components
used in circuit are bulb, current switch, cell and wire.
Fuse is used to reduce the danger of short circuits or over flow of
current.
Electrostatic is the branch of science that deals with the charges
at rest.
Static
electricity refers to the storage of electric
charges on the surface of an object.
Lightning is the natural example of static
discharge.
Similar charged bodies repel each other.
Opposite charged bodies attract each other.
Electroscope is used for finding the nature of charge on a body.
A piece of iron that attracts other pieces of iron,
Nickel, Cobalt etc. towards itself is called Magnet.
Earth attracts everything towards itself. So the earth behaves like a magnet.
Magnet has two poles North Pole and South Pole.
The
same poles repel each other while the opposite poles attract each
other.
The space around a magnet in which its magnetic
effect is felt is called magnetic field.
Electromagnetism: The magnetism produced by electric current is called electromagnetism.
Large electromagnets are used in some cranes to lift heavy iron objects.
Magnetic
compass is a devise used to find out the
direction at any place on earth.
We use fuse to make a circuit safe.
Charges at rest are called static charge.
When two surfaces touch and rub against each other and the electrons move from one object to another. a) Short circuit occurs b) Static charge is formed c) Electric current is formed d) Wire of fuse melts
