Question

How many electrons flow when a current of $5$ amperes is passed through a conductor for $200$ seconds?

• A. $6.241 \times 10^{21}$
• B. $6.0241 \times 10^{21}$
• C. $6.241 \times 10^{22}$
• D. $6.0241 \times 10^{22}$

Answer 1

Answer: (A)

$Q=I t $

$=5 \times 200=1000 $ coulombs

Charge carried by 1 electron $=1.6 \times 10^{-19} C$

$\Rightarrow $ No. of electrons for $1000 C =\frac{1000}{1.6 \times 10^{-19}}$

$=6.241 \times 10^{21}$