Why a rubber rod becomes negatively charged when rubbed with fur?

Video Transcript

Hi when two materials are rubbed together, then there will be transferred of electrons From one body to another body, and hence the materials will get electrically charged. So when a rubber road is rubbed, buy offer, then the electrons will be transferring from but to the rubber road, hence making forward positively charged and rubber road negatively charged. This is because rubber roads will attract more electrons or we can say, molecules in rubber road have strong attraction than for. Hence, the answer to our question is option B. The solution is clear. Thank you.

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What I think is : The protons are present at the centre of the atom with rotating electrons around it so when it is rubbed by fur the electrons get passed from the ebonite rod to the fur leaving the rod negatively charged. But in reality the rod is negatively charged Why ?

asked Feb 2, 2014 at 11:39

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When you rub fur with ebonite rod, the chemical bond is formed between some parts of the the two surface. Rod has its electron more tightly bound than fur. So, fur donates electrons to the rod while electrons from rod won't come out. Due to excess of electrons in rod, it becomes negatively charged while the fur with lost electrons, becomes deficient of electrons. Thus, fur becomes positively charged.

answered Feb 2, 2014 at 13:00

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When an ebonite rod is rubbed with fur the rod gets negatively charged because the friction between the fur and the rod makes the ebonite rod to gain electron from the fur. This is because, electrons in fur are less tightly bound than the electrons in the ebonite rod .

answered Aug 8, 2014 at 7:53

aswinaswin

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the rod is neutral so it gains electrons from the fur to become negatively charged thus making the fur positively charged. loss of electron =+ve gain of electron= -ve

answered Mar 29, 2014 at 15:57

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