Proton NMR spectrum

[arze]

Draw and name the isomer of pentene which has three peaks in its low-resolution proton NMR spectrum and give the relative areas under the peaks.

I don't really understand proton NMR, so an explanation of it will be appreciated. I checked the wikipedia article about it but couldn't understand anything there.
Thanks!

[TheMasterMind]

first thing is first draw out the isomers like so

CH2=CH-CH2-CH2-CH3 (5 different h's)

CH3-CH=CH-CH2-CH3 (5 different h's)

..... ....CH3
.... .....|
CH2=C-CH2-CH3 (4 different h's)

.... .... ......CH3
..... ...... ....|
CH2=CH-CH-CH3 (4 different h's)


....... .CH3
..... ...|
CH3-C=CH-CH3 (3 different h's)

Now, is it evident which will have 3 peaks?

[arze]

the one with 3 peaks is the isomer with 3 different h's, so the isomer is the last one?
thank you very much!

[TheMasterMind]

yes, correct. how would you name it?