This content explains the fundamental concept of an electrical circuit and differentiates between conductive and insulating materials through a practical demonstration.
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and learn.
Welcome back to Science Madness.
In today's program, we're going to learn
more about electricity. We'll create an
electrical circuit and we'll find out
which materials are conductors and
We will start by building an electrical
circuit which as you know is a closed
path that electric charges flow through.
I will need two wires, a light bulb and
a battery. We will attach one end of the
wire to the light bulb and the other to
one of the batteries ends. I'll repeat
the same steps with the other wire and
voila, we've just created an electrical
circuit. The electric charges flow from
the battery to the light bulb through
the wires. And as a result, the light
bulb lights up. Isn't it impressive?
If I disconnect this circuit, the
electric current stops flowing and the
light bulb turns off. When I reattach
the wire, the light bulb turns back on.
How cool is that? [Music]
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Let's make this more interesting. What
would happen if I added this spoon to
the circuit? Do you think the light bulb
would still work? Would you like to make
a bet?
Ta! The light bulb came on. Amazing,
isn't it? Just like the copper inside
the wires, this spoon is made of metal,
and metal is a great conductor of electricity.
electricity.
Silver, iron, or aluminum are examples
of conductive metals. Conductive
materials allow electrical charges to
flow through them and therefore are the
best materials to add to an electrical circuit.
circuit.
But conductive materials aren't only
metals. Water, for example, is also a
Let's try another type of material. Look
at this rubber ducky. If we attach it to
the circuit, what will happen? Will the
light bulb turn on?
Ooh, the light bulb didn't turn on. The
little ducky is made of rubber, and
rubber is an insulating material.
Insulating materials do not allow
electric charges to flow through them.
That's why the light bulb didn't light
up. Other materials such as paper,
plastic, or glass are also insulators.
As you know, electricity can be very dangerous.
dangerous.
So, insulating materials are used to
protect us from it. For example, the
outside of wires are made of plastic and
electricians gloves are made of rubber.
Well, I think that's it, friends. I hope
you had fun and at the same time learned
a lot of interesting things about electricity.
electricity.
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