Question

how many electrons are present in one coulumb ?​

Answer 1

Explanation:

A single electron has a charge of 1.60217733 × 10-19 Coulombs. A collection of 6.2415 × 1018 electrons has a charge of one Coulomb (1/1.60217733x10-19). 1.6 into 10 raise to power -19 no of electrons are present in one coulomb of charge.

Answer 2

To Find:

Number of electrons in 1C

Solution:

We know that,

• According to quantisation of charge, charge on any body is strictly in integral multiples of 'e'(charge on 1 electron) or the minimum possible charge on a body is charge on 1 electron

i.e.  $\pink{\boxed{\bf{Q=Ne}}}$

where,

N is any integer

e is the charge on electron= 1.6×10⁻¹⁹C

$\rule{190}{1}$

Now, let the total number of electrons present in 1 C charge be N

So, on using above formula, we get

$\longrightarrow\rm{Q=Ne}$

$\longrightarrow\rm{1=N\times1.6\times10^{-19}}$

$\longrightarrow\rm{N\times1.6\times10^{-19}=1}$

$\longrightarrow\rm{N=\dfrac{1}{1.6\times10^{-19}}}$

$\longrightarrow\rm{N=0.625\times10^{19}}$

$\longrightarrow\rm{N=6.25\times10^{18}}$

Hence, 6.25×10¹⁸ electrons are present in 1 C of charge.