Electricity and Magnetism
1) The rate of flow of charge across conductor
is called Electric Current.
2) The unit of current is Ampere.
3) The
path of flow of charges is called electric circuit.
4) The components
used in circuit are bulb, current switch, cell and wire.
5) Fuse is used
to reduce the danger of short circuits or over flow of current.
6) Electrostatic is the branch of science that deals with the charges
at rest.
7) Static electricity refers to the storage of electric charges on the
surface of an object.
8) Lightning is the natural example of static
discharge.
9) Similar charged bodies repel each other.
10) Opposite charged bodies attract each other.
11) Electroscope is used for finding the nature of charge on a body.
12) A piece of iron that attracts other pieces of iron,
Nickel, Cobalt etc. towards itself is called Magnet.
13) Earth
attracts everything towards itself. So the earth behaves like a magnet.
14) Magnet has two
poles North Pole and South Pole.
15) The same
poles repel each other while the opposite poles attract each
other.
16) The space around a magnet in which its magnetic
effect is felt is called magnetic
field.
17) Electromagnetism: The magnetism produced by electric current is
called electromagnetism.
18) Large electromagnets are used in some cranes to lift heavy iron objects.
19) Magnetic compass is a devise used to find out the direction at any
place on earth.
20) We use fuse to make a circuit safe.
21) Charges at rest are called static charge.
MCQs
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
Electric current is the flow of;
a) Heat
b) Charges
c) Light
d) Atoms
The SI unit of charge is called:
NTS CT25/08/2019 (11:30)
a) Coulomb
b) Newton
c) Ampere
d) Ohm
How many types of charge?
a) two
b) three
c) four
d) five
