Basics of electricity 1 ~ Let's think about the meaning of the formula ~ | Science

Last time, I talked about "Electricity 7-Let's experience the resistance of heating wires".

It was about the basic idea of ​​current and resistance.

The science that elementary and junior high school students study is really wide-ranging.

Children will have their own strengths and weaknesses, depending on their individuality and orientation.

I have problems with aqueous solutions
I'm good at it.

I like talking about the sun and the universe,
You can solve most of the problems.

Science feels more familiar than the society and national language that somehow feels like "studying."

Because it is familiar, it is easy to show likes / dislikes, strengths / weaknesses.

And I think that there are few people who are good at electricity.

I don't really understand electricity.

Why is it difficult to understand?

The reason is that it is easy to get confused because there are three "current, voltage, resistance".

yes.What's going on
I don't know.

When studying electricity, you first need to understand "Ohm's law."

Instead of "memorizing" this Ohm's lawIt is important to imagine and understandI talked about.

And let's rethink the meaning of Ohm's law.

See the two formulas above.

It's the same.

It should be the same whether it's multiplication or division.

Is it "same"?

As for arithmetic, it's the same.

Whichever way you think about it, you will get the same result.

Now let's consider the meaning of the formula.

What is the "meaning of the formula"?

I've never thought about that.

Think a little about what the above two formulas mean.

Let's think about "the meaning of division and multiplication" without thinking hard.

The meaning of each formula is as follows.

This is natural, isn't it?

I know this.

In the above formula,"Current is voltage divided by resistance".

In other words, What is an electric current? "It is generated when a voltage is applied."Means that.

And, "If you divide the voltage by the resistance, you can find the value of the current."

That's right

In the formula below"Voltage is the value of current multiplied by resistance".

in short,Voltage has something to do with "current generated when voltage is applied"

And, "voltage and current are in a proportional relationship, and when you apply resistance to current, it becomes voltage."

I agree.

Isn't it the same?

It's "same" in math, but a little different in science.

"The formula is the same and the same value", but the meaning of the formula is different.

In the above formula"Current is the leading role".

In the formula below"Voltage is the leading role".

Because we often ask for current
I wonder if the above formula is better.

Think again about current, resistance, and voltage.

The electric current is generated by the battery applying voltage and "lifting it up".

"There is voltage, and current flows for the first time."It is

Next time, let's think about the viewpoint of "easy to think" and "easy to solve" the problem of electricity.

table of contents