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Physics Question on Electric Charge

A polythene piece rubbed with wool is found to have a negative charge of 6×10−7 C6 \times 10^{-7}\, C. The number of electrons transferred to polythene from wool is

A

3.75×10103.75 \times 10^{10}

B

9.6×10109.6 \times 10^{10}

C

9.6×10129.6 \times 10^{12}

D

3.75×10123.75 \times10^{12}

Answer

3.75×10123.75 \times10^{12}

Explanation

Solution

Here, q=−6×10−7 Cq = - 6 \times 10^{-7}\, C ∴\therefore Number of electrons transferred from wool to polythene, n=qe=−6×10−7−1.6×10−19=3.75×1012n=\frac{q}{e}=\frac{-6\times10^{-7}}{-1.6\times10^{-19}}=3.75\times10^{12}