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TheoehT
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Triboelectrics... Help please.
this problem is a worked example in my textbook.. but it looks like they have just pulled numbers from thin air. I really don't understand how they got these answers.. can anyone explain?
A perspex rod is rubbed with a piece of silk. it acquires a charge of 0.02uC
a) How many electrons are transferred?
b) is this charge is now transderred to an electroscope with charge +0.01uC what will be the net state of the electroscope?
Book's Solution:
0.02 x 10^-6 x 6.25 x 10^18 electrons -or-
a) 1.25x10^-11 electrons transferred.
b) total charge on the electroscope after transfer:
0.02uC + 0.01uC = 0.03uC (+)
the electroscope leaf deflection will increase and the net charge on the electroscope is now +0.03uC = 1.87x10^11 electrons depleted
I really don't understand, can anyone help?
this problem is a worked example in my textbook.. but it looks like they have just pulled numbers from thin air. I really don't understand how they got these answers.. can anyone explain?
A perspex rod is rubbed with a piece of silk. it acquires a charge of 0.02uC
a) How many electrons are transferred?
b) is this charge is now transderred to an electroscope with charge +0.01uC what will be the net state of the electroscope?
Book's Solution:
0.02 x 10^-6 x 6.25 x 10^18 electrons -or-
a) 1.25x10^-11 electrons transferred.
b) total charge on the electroscope after transfer:
0.02uC + 0.01uC = 0.03uC (+)
the electroscope leaf deflection will increase and the net charge on the electroscope is now +0.03uC = 1.87x10^11 electrons depleted
I really don't understand, can anyone help?
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