a polythene piece is rubbed with wood it is found to acquire a negative charge of 3.2 into 10 raise to power minus 7 coulomb estimate the number of electrons transferred to the piece
guys it's very urgent
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(a) We know, electric charge of a body is quantized
e.g., Q = ne
Given,
- Q = 3 × 10⁻⁷C
- e = 1.6 × 10⁻¹⁹ C [ charge on each electron ]
- n = Q/e = 3 × 10⁻⁷/1.6 × 10⁻¹⁹
= 3/1.6 × 1.875 × 10¹²
So, 1.875 × 10¹² electrons have transferred from wool to polythene .
(b) yes ,
as you know, mass of electron = 9.1 × 10⁻³¹ kg
∴ transfer of mass = number of electron × mass of each electron
= 1.875 × 10¹² × 9.1 × 10⁻³¹
= 1.71 × 10⁻¹⁸ Kg has transferred from whool to polythene.
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