Question

Device 1
Device 2
Basis of work
Heating effect of current
Magnetic effect of current
cal
Tervisice
able words for the following explanation:
4. Write the names of two devices that work on the given basis of work in first column)​

Answer 1

Answer:

Before we go to school or to attend any function, we ensure that our clothes are crisp and not crimped. And for this, we use an iron to straighten out those clothes. Why do we only use an iron? What’s the mechanism behind the working of an iron? And why is an iron always hot? Well, this iron is the most basic example of heating effects of electric current in our everyday life. There are many such other devices that work on the heating effects of electric current. Let us study them below.

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Questions

What are the heating effects of the electric current?

When a current flows through a conductor, heat energy generates in the conductor. The heating effects of electric current depend on three factors:

The resistance of the conductor. A higher resistance produces more heat.

The time for which the current flows. The longer the time the amount of heat production is high.

Higher the current the amount of heat generation is also large.

Hence the heating effect produced by an electric current, I through a conductor of resistance, R for a time, t is given by H = I2Rt. This equation is the Joule’s equation of electrical heating.