ALL PHYSICS DOUBTS - POST HERE !!

[Ivo]

magnetising magnet......... huh?? didnt get u

Like can a permanent magenet be created with iron

[~HyDrOgEn~]

A - both point towards north

Yeah i knowthat, but why explain!!!

[Ghost Of Highbury]

Yeah i knowthat, but why explain!!!

 a compass always points towards the north, the brass rod doesnt make a difference.

[Ghost Of Highbury]

Like can a permanent magenet be created with iron

no iron is a soft magnetic material. it loses its magnetism easily.

steel can be used to create permanent magnets.

[Ivo]

no iron is a soft magnetic material. it loses its magnetism easily.

steel can be used to create permanent magnets.

So I still don't get it.  For induced magnetism, can a hard magnetic material (eg steel) be magnetised when a manget is brought near it?  Does it lose magentism when magnet is taken away?

[Fastal]

what are the ways of creating a magnet? can a permanent magnet be made just by magnetizing steel once with an electromagnet?

[holtadit]

Quick question.

Is monochromatic light of ONE FREQUENCY or ONE WAVELENGTH ?

[Dana]

Quick question.

Is monochromatic light of ONE FREQUENCY or ONE WAVELENGTH ?

one colour thus one wavelength i guess

[Dana]

So I still don't get it.  For induced magnetism, can a hard magnetic material (eg steel) be magnetised when a manget is brought near it?  Does it lose magentism when magnet is taken away?

Hmm, not sure. Don't stress yourself over it too much though, I'm sure it's not THAT important. You know the basics and stuff right?

[omair]

Quick question.

Is monochromatic light of ONE FREQUENCY or ONE WAVELENGTH ?
[/quoteONE WAVELENGTH

[dodi23]

Quick question.

Is monochromatic light of ONE FREQUENCY or ONE WAVELENGTH ?

monochromatic is one colour with one definite frequency!!

[Ghost Of Highbury]

One frequency. One speed. One wavelength.

As the speed of light is constant, and the frequency of that monochromatic light cant change, its wavelength remains the same. Provided the light is travelling in one medium.

[Dana]

what are the ways of creating a magnet? can a permanent magnet be made just by magnetizing steel once with an electromagnet?

magnetising with an electromagnet?   You mean by a coil/d.c.? Then yes, it can make a permanent magnet. You can also suspend it in the N-S position and hammer it. That'll make a permanent magnet too

[the_grim_reaper]

Ahh yes I used to live in Riyadh now I live in Khobar. How is it there?
Haha we have a pretty > invigilator too. Gives the dirtiest looks you'll ever see -.- Almost got kicked out of my bio exam cuz i forgot my statement of entry  
Yeaa I guess, but usually variants are pretty similar in paper 1. I dno I still love to know whether it was easy or difficult
where ru from?

Believe me the two variants are different as hell this time. Well some of my esteemed fellows took the liberty to call all the way to Pakistan and find out about the other variant and they were utterly disappointed after doing their papers . From Pakistan but was born in Riyadh ..

Anyway, people about to go for the exam. Any final piece of advice??? Well I've got to say something. DON'T ever forget to use the toilet before an exam. I was later to find out the consequences during my English Paper 4... .

[Ghost Of Highbury]

Hmm, not sure. Don't stress yourself over it too much though, I'm sure it's not THAT important. You know the basics and stuff right?

Making a magnet

Stroking method (repetitive contact b/w magnet and steel)

Electrical method

Destroying magnetism

Hammering

Heating

Alternating current method