In this article, we will discuss activity 12.2 class 10 science. You will find a complete explanation with a conclusion. After studying this activity 12.2 Class 10 Science Electricity, you will be able to solve Questions of Chapter 12 Electricity.
NCERT Class 10 Science Activity 12.2 Solution Electricity
Activity
12.2 Class 10 Science
·
Take a nichrome wire, a torch bulb and an ammeter(0.5 A
range), a plug key, and some connecting wires.
·
Set up the circuit by connecting four dry cells of 1.5 V each
in series with the ammeter leaving a gap XY in the circuit.
·
Complete the circuit by connecting the nichrome wire in the
gap XY, and plug the key. Note down the ammeter reading. Take out the key from the plug.
[Note: Always take out the key from the plug after measuring the current
through the circuit]
·
Replace the nichrome wire with the torch bulb in the circuit
and find the current through it by measuring the reading of the ammeter.
·
Now repeat the above step with the 10 W bulb in the gap XY.
·
Are the ammeter readings different from components in the gap
XY? What does the above observation indicate?
·
You may repeat this activity by keeping any material
component in the gap. observe the ammeter readings in each case. Analyze the
observation.
Observation Activity
12.2 Class 10 Science
The
ammeter readings are different in each case because current flows in each case
are different.
Explanation Activity
12.2 Class 10 Science
Electric
current flows through a component depending upon the resistance of the component.
We use different components in the gap XY such as nichrome wire, torch bulb, and
10 W bulb. Conductivity is different for different materials.
Since
V is constant in the case so according to Ohm’s law
V=IR
So
current I become inversely proportional to resistance R
Conclusion
Activity 12.2 Class 10 Science
Different
materials show different conductance or resistance.
Related Topic for you
1. Next Activity- Activity 12.3 Class 10 Science
2. Previous Activity - Activity 12.1 Class 10 Science
3. Solution of Chapter 12 Electricity
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