Fill in the blanks with the correct words:
An electromagnet attracts
hammer, safety, insulated wire, symbols, iron
pieces when a current flows through it.
hitting the gong that makes a ringing sound in an electric bell.
In a circuit diagram, the various components are represented by standard
device.
An electromagnet consists of a piece of soft iron with a
wound around it.
It is the
An electric fuse is a
te True or False:
Answers
Answer:
WE ALL ARE ALIKE ACCORDING TO THE POET IN THE POEM NO MEN ARE FOREIGN . IN THE WAY WE ALL BREATHE IN THE SAME AIR ,WE ALL WALK ON THE SAME EARTH, WE ALL STARVE TOGETHER DURING THE EXTENDED WAR AND EVEN WE ALL TAKE BIRTH AND DIE IN THE SAME WAY SO THERE IS NO DIFFERENCE BETWEEN US .No wonder that besides the scriptures in many cultures nature is also worshipped. The message that we get is to save our environment and maintain ecological balance. People are taught to live in harmony with nature and recognise that there is God in all aspects of nature. Nature is a great teacher.
Explanation:
Question 1:
Write one word for the following.
1. An unbroken path through which electric current can flow .....................
2. A very thin wire made of a special material (such as tungsten) which glows in a bulb .....................
3. Tightly wound coils found in appliances which heat up .....................
4. A safety device used to prevent an over flow of electric current .....................
5. A device used to open or close an electric current .....................
ANSWER:
Circuit.
Filament.
Solenoid.
Fuse.
Electric switch.
Page No 188:
Question 2:
Wire one example for the following.
1. One necessary component of an electric circuit .....................
2. A material used to make the filament of an electric current .....................
3. An appliance that is based on the heating effect of electric current .....................
4. A material used to make the core of an electromagnet .....................
ANSWER:
Electric cell.
Electric cell is a necessary component of an electric circuit.
Tungsten.
Tungsten is used to make the filament of an electric bulb.
Electric iron box.
Electric iron box works on the principle of heating effect of electric current.
A piece of soft iron.
A piece of soft iron is used to make the core of an electromagnet.
Page No 188:
Question 1:
In a circuit diagram, the various components of the circuit are represented by
(a) standard pictures
(b) circle
(c) lines
(d) standard symbols
ANSWER:
(d) Standard symbols.
The various components in a circuit diagram are represented by standard symbols.