Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

$10^{18}$ electrons pass from point A to point B in 0.1 s in a conductor. The value of the current is

Options:

2.6 A

0.6 A

16 A

1.6 A

Correct Answer:

1.6 A

Explanation:

The correct answer is Option (4) → 1.6 A

$\text{Given: Number of electrons } n = 10^{18},~ t = 0.1~\text{s}$

$\text{Charge of one electron } e = 1.6 \times 10^{-19}~\text{C}$

$\text{Total charge transferred: } Q = n \cdot e = 10^{18} \cdot 1.6 \times 10^{-19} = 0.16~\text{C}$

$\text{Current: } I = \frac{Q}{t} = \frac{0.16}{0.1} = 1.6~\text{A}$

$\text{Answer: } I = 1.6~\text{A}$