How many electrons must be removed from an electrically neutral silver coin to give it a charge of +3c. is there any transfer of mass also? [2] 5. how much positive and negative charges is there in a cup of water?
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NEET >> Physics >> Class12 >> Electric Charges and Fields
How many electrons must be removed from a piece of metal to give it a positive charge of 1×10−7C?1×10−7C?
(a)6.25×1011(b)6.25×1019(c)1.66×1019(d)3.125×1011(a)6.25×1011(b)6.25×1019(c)1.66×1019(d)3.125×1011
jeemain physics class12 ch1 electrostaticselectric-charges-and-fields electric-charge easy
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asked Jan 29, 2014 by yamini.v 1 flag
recategorized Aug 22, 2014

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Toolbox:The SI unit of quantity of electric charge is the coulomb, which is equivalent to about 6.242×10186.242×1018 e (e is the charge of a proton). Hence, the charge of an electron is approximately 1.602×10?191.602×10?19 C.
Answer : (a) 6.25×10116.25×1011
Explanation : Let the number of electrons removed be n Then
n×1.6×10−19=1×10−7n×1.6×10−19=1×10−7
n=6.25×1011.
How many electrons must be removed from a piece of metal to give it a positive charge of 1×10−7C?1×10−7C?
(a)6.25×1011(b)6.25×1019(c)1.66×1019(d)3.125×1011(a)6.25×1011(b)6.25×1019(c)1.66×1019(d)3.125×1011
jeemain physics class12 ch1 electrostaticselectric-charges-and-fields electric-charge easy
 Share
asked Jan 29, 2014 by yamini.v 1 flag
recategorized Aug 22, 2014

1 Answer
Need homework help? Click here.
Toolbox:The SI unit of quantity of electric charge is the coulomb, which is equivalent to about 6.242×10186.242×1018 e (e is the charge of a proton). Hence, the charge of an electron is approximately 1.602×10?191.602×10?19 C.
Answer : (a) 6.25×10116.25×1011
Explanation : Let the number of electrons removed be n Then
n×1.6×10−19=1×10−7n×1.6×10−19=1×10−7
n=6.25×1011.
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