Question

A current of 15 A flows through a conductor for 20 s. What amount of charge passes through the conductor ?

• A. $30C$
• B. $0.75C$
• C. $3C$
• D. $300C$

Answer 1

Answer: (D)

$300C$

1C is the quantity of charge which passes any point in a circuit in which a current of 1A flows for 1s
It should be noted that the Coulomb is a rather large quantity of charge. 1C is the quantity of charge carried by (approximately) $6\times {10}^{8}electrons$.
Hence, charge is given as

$Q=It=15A\times 20s=300C$.