Page 130 - Genius Kidz Prudence Learning Sc-8

Intensity of light produced by an electric more amount of current to pass through them.
device is judged by heating effect of current For e.g. tap water and kerosene are poor
flowing through it. More the current, more is conductors where as salt solution and lemon

the heat, more is the light produced. Indirectly juice are good conductors.
or directly we can say that current of 10 A will One very important point that can be drawn
produce more light in a LED as compared to the out from above examples is that salt allows
current of 2A (LED=Light Emitting Diode). conduction of electricity i.e., why salty water is
Conducting power of different conductors a good conductor as compared to tap water

allow their classification into poor and good which contains less salt. So we can conclude
conductors of electricity. Poor conductors are that pure water or water without any salt
those that allow the passage of little current content must be an insulator.
through them whereas good conductors allow

Activity 1
Why we are always asked to not touch the electric appliance and electric switches with wet hands.

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Activity 2
[Warning Under the guidance of a teacher] [Hint: Magnetic effect is
produced by electric current.] Jack is confused which one among the two
conducts more current: Cold coffee or hot coffee. Can you help him.
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Thomas Edition is created to have invented the first light bulb. But you know what he did not invent the first light bulb
but he did invent one which stayed let for a few seconds.

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