A polythene piece rubbed with wool is found to have a negative charge of 3×10–7 C. Estimate the number of electrons transferred (from which to which?) Is there a transfer of mass from wool to polythene?
A polythene piece rubbed with wool is found to have a negative charge of 3×10–7 C. Estimate the number of electrons transferred (from which to which?) Is there a transfer of mass from wool to polythene?
Given, charge on polythene =−3×10−7 C
The charge on an object is given by q=±ne
The number of electrons transferred n=Total charge (q)Charge of electron (e)n=−3×10−7−1.6×10−19=1.875×1012
Thus, the number of electrons transferred is 1.875×1012. Electrons will be transferred from wool to polythene because polythene attains the negative charge that means it gains the electrons.
As the electrons are transferred from wool to polythene, the mass is also transferred because along with the charge each electron will also carry its mass.
The number of electrons transferred =1.875×1012
The mass of one electron =9.1×10−31kg
Mass transferred from wool to polythene= Number of electrons×Mass of one electron=1.875×1012×9.1×10−31=1.7×10−18kg
Thus, 1.7×10−18kg mass is transferred from wool to polythene.
Given, charge on polythene =−3×10−7 C
The charge on an object is given by q=±ne
The number of electrons transferred n=Total charge (q)Charge of electron (e)n=−3×10−7−1.6×10−19=1.875×1012
Thus, the number of electrons transferred is 1.875×1012. Electrons will be transferred from wool to polythene because polythene attains the negative charge that means it gains the electrons.
As the electrons are transferred from wool to polythene, the mass is also transferred because along with the charge each electron will also carry its mass.
The number of electrons transferred =1.875×1012
The mass of one electron =9.1×10−31kg
Mass transferred from wool to polythene= Number of electrons×Mass of one electron=1.875×1012×9.1×10−31=1.7×10−18kg
Thus, 1.7×10−18kg mass is transferred from wool to polythene.
