write about any 4 or 5 practical applications of heating effect of electric current used around you in your daily life.draw the corresponding figure
Answers
Answer:
Electric Bulb: In an electric bulb, the filament of bulb gives light because of heating effect of electricity. The filament of bulb is generally made of tungsten metal; having melting point equal to 3380°C.
Electric iron: The element of electric iron is made of alloys having high melting point. Electric heater and geyser work on the same mechanism.
Electric fuse: Electric fuse is used to protect the electric appliances from high voltage; if any. Electric fuse is made of metal or alloy of metals, such as aluminium, copper, iron, lead, etc. In the case of flow of higher voltage than specified, fuse wire melts and protects the electric appliances.
Fuse of 1A, 2A, 3A, 5A, 10A, etc. are used for domestic purpose.
Suppose, if an electric heater consumes 1000W at 220V.
Then electric current in circuit
I
=
P
V
Or,
I
=
1000
W
−
220
V
=
4.5
A
Thus, in this case a fuse of 5A should be used to protect the electric heater in the case of flow of higher voltage.
Electric Power:
SI unit of electric power is watt (W).
1
W
=
1
volt
×
1
ampere
=
1
V
×
1
A
1 kilo watt or 1kW = 1000 W
Consumption of electricity (electric energy) is generally measured in kilo watt.
Unit of electric energy is kilo watt hour (kWh)
1
k
W
h
=
1000
watt
×
1
hour
=
1000
W
×
3600
s
Or,
1
k
W
h
=
3.6
×
10
6
watt second
=
3.6
×
10
6
J
Answer:
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