The top student in the school got 0 points. Jpg Physics Department explained

I’m here to explain who this is

First of all, the conclusion is that you are right

We need to organize the terminology first

wind closely = wire winding density NL is high

wind a lot = the number of wires wound is high

However, if you look at the magnetic properties, there is a property proportional to density NL and a property proportional to frequency N

For example, the magnetic field produced by the coil is proportional to the density NL

Current electromagnetic induction induced in the coil is proportional to the number of times N

This is an electromagnetic induction phenomenon when you look at the test questions, and this is strictly proportional to N

So the teacher who said I should wash a lot must be a student who said I should wash it right and dense

If you ask for a magnetic field instead of electromagnetic induction, it’s a close wind

However, regardless of who is right or wrong, I think the short answer question is 20 points, and I think the score distribution is wrong. I think it’s okay to give a partial score

conclusion

In physics, it’s very important to know exactly what phenomena are proportional to what physical quantity

The current induced in the coil is strictly a physical quantity proportional to the number of times

It means density, so the student’s answer is wrong