static electricity
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from o level syllabus:
a plastic rod rubbed with a dry cloth becomes positively charged.
so, electrons can only be lost or gained since protons are fixed in place..
MCQ included both options of loss/gain of electrons, dont know which answer to choose, kindly instruct me
secondly, charging by friction/induction, which method works best for electrical conductors and insulators, and why?
i know that charging by friction for conductors is not viable because the hand holding it would act by earthing the conductor due to the electrons being transferred via conduction, whereas this wouldnt happen for insulators.
for induction, it is easy to use induction on conductors, but difficult to use induction on insulators. need to know why.
ok this is a pretty long post, ty for any help and your time
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hallo!
become positively charged means electrons are loss since electrons are negatively charged :D
induction involves flow of electrons, and insulators do not allow flow of electrons easily, hence can't use induction for insulators :D
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ok another question i grabbed from a textbook:
a battery is labelled as 1600mAh (can last 1 hr if it supplied 1600mA of current), find the amount charge stored on the battery
was wondering if I = Q/t would work, converted to SI unitsit will supply 0.44mA/s
0.44 = Q/1
Q= 0.44
is that correct?
