Question

A polythene piece rubbed with wool is found to have a negative charge of 3.2 x 10-7c. Estimate the number of electron transformed.

Answer 1

Answer:

Explanation:

here is the answer

Answer 2

Given :-

Charge on the polythene piece = 3.12 × 10⁻⁷ C

To Find :-

Estimate the number of electron transformed.

Analysis :-

In order to find the number of electron transformed, substitute the given values accordingly such that integer is equal to charge divided by the electronic charge.

Solution :-

We know that,

• e = Electronic charge
• n = Integer
• q = Charge

Using the formula,

$\underline{\boxed{\sf Charge=Integer \times Electronic \ charge}}$

Given that,

Charge (q) = 3.2 × 10⁻⁷ C

Electronic charge (e) = 1.6 × 10⁻¹⁹ C (change is each electron)

Substituting their values,

$\sf =q=n \times e$

$\sf =3.2 \times 10^{-7} = n \times 1.6 \times 10^{-19}$

$\sf = n=\dfrac{q}{e}$

$\sf =n=\dfrac{ 3.2 \times 10^{-7}}{1.6 \times 10^{-19}}$

$\sf = n=2 \times 10^{12}$

Therefore, the number of electron transformed is 2 × 10¹².