Question

Charge on an electron is 1.6 * 10-19 c how many eletrons are required to accumulate a charge of one coulomb

Answer 1

Answer:

Given:

Charge on an electron = 1.6 × 10^(-19) coulomb.

To find:

Number of electrons constituting a charge of 1 coulomb.

Concept:

Always remember the following conditions :

• The least charge that can exist is that of charge present in an electron.
• We can say that the charge of an electron is the smallest packet of charge available.

Calculation:

Number of electrons present in 1 coulomb charge :

$= \frac{1}{1.6 \times {10}^{ - 19} }$

$= 6.25 \times {10}^{18} electrons$

So final answer is 6.25 × 10^18 electrons

Answer 2

$\huge{\underline{\underline{\red{\mathfrak{Answer :}}}}}$

Charge of an electron (e) = 1.6 * 10^(-19) C

Charge (Q) = 1 C

Use relation

$\Large{\underline{\boxed{\sf{Q \: = \: ne}}}}$

Where,

• Q is charge
• n is number of electrons
• e is electron charge

Putting these values in formula

$\rightarrow {\sf{n \: = \: \dfrac{Q}{e}}}$

$\rightarrow {\sf{n \: = \: \dfrac{1}{1.6 \: \times \: 10^{-19}}}}$

$\rightarrow {\sf{n \: = \: 6.25 \: \times \: 10^{18}}}$

$\small \implies {\boxed{\sf{No. \: of \: electrons \: = \:6.25 \: \times \: 10^{18}e^{-}}}}$