Resistivity - A Level Physics

If I have two copper wires with the same diameter, but one is longer than the other, you can expect the longer wire to have a higher resistance.

That’s because an electron needs to make its way between more positive ions before it reaches the other end. This means resistance is proportional to the length of wire.

Two wires that have the same length but have different cross-sectional area will have different resistance. The larger the cross sectional area a wire has, the lower the resistance it has. Resistance is inversely proportional to area.

We also need a way to take into account the material's ability to impede the motion of electrons. This is called resistivity.

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[missmathician_]

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[doseoffaiyaz]

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[unwpulx]

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[GtRith]

The amount of information you are giving in 3 minutes felt like a 15 mins video. Thank you so much

[jingkmennongkrem-eqyv]

It's is better than 2-3 hours of lecture. ❤ thank for the video 😊

[s.liebe]

Just a perfect video, you make it all clear for me

[Basic-Tron]

Absolutely terrific video, great job! 😇

[aboobakarmohammed]

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[nuoezrr]

You have explained it in the most easy way great explanation skills

[adbhutpandey]

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[mohammadridwan]

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[alonzoball]

Such a clear and nice video and yet few views..well done, keep grinding.

[czmuetg]

i was always so confused by these two things. now finally!! thanks a lot. tomorrow is sci boards and this will surely help

[darf]

WORDS CANT EXPRESS HOW THANKFUL IM TO U
I was having doubt in this concept for so long and u were able to finish my doubt in just a couple of mins
tyms once again

[ritinyadav]

If resistivity is constant than in the formula rho=(ohm×m2)÷m with any good conductor of material, if we change the length or the cross section area the resistivity is changing

[WotansKarl]

If only they would publish tables where this info could be looked up at need instead of giving hypothetical materials and resistivities to students to figure out.

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You can never know you need this knowledge .... You are only here because you attended a college ... Bye

[hirastic]

Hello! Thanks for this video ❤️ I wanted to ask a question regarding resistivity. In my textbook it is mentioned that resistivity depends on temperature. However, you have mentioned that resistivity is an intrinsic property and does not depend on the material's geometry. So, why is resistivity being affected by Temperature ?(and also can you explain the term 'geometric property’).

[aboobakarmohammed]

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[mustafamrian]

Add a arabic translation i need this for my exam😭