Question

If $10$ x ${10}^{19}$ electrons pass through the cross-section of a wire in $2$ s, calculate the electric current flowing through the circuit.

• A. $8$ A
• B. $16$ A
• C. $20$ A
• D. $2$ A

Answer 1

Answer: (A)

$8$ A

$Q=Ne$ where $N=$ number of electrons

Current$=I=\frac{Q}{t}=\frac{Ne}{t}$

$⟹I=\frac{10\times {10}^{19}\times 1.6\times {10}^{-19}}{2}$

$⟹I=8A$

Answer-(A)