Question

1 micro Coulomb charge contains n units of basic charge e, where n is ?
a. 6 × 10^12
b. 3 × 10^18
c. 4 × 10^6
d. 8 × 10^15​

Answer 1

q = ne

${10}^{ - 6} = n \times 1.6 \times {10}^{ - 19} \\ n = 6.25 \times {10}^{12}$

so your answer is (a)

Answer 2

Answer:

One micro Coulomb charge contains 6.25 ×10¹² basic charge units.

Therefore, the option (a) is correct.

Explanation:

• The magnitude of the elementary charge (e) is equal to the value of the charge on an electron. However, the electron is holding negative charge.
• The elementary charge  or basic unit of charge (e) is equal to 1.6×10¹⁹C.
• Quantization is the property of electric charge. In which all the free charge has to be the integral part of basic unit of charge.

Therefore, q = ne                                                                ..................(1)

We have given q = 1mC = 10⁻⁶C

and, e = 1.6×10¹⁹C

Substitute the value of 'q' and 'e' in equation (1);

$10^{-6}=n*1.6*10^{-19}$

$n=\frac{10^{-6}}{1.6*10^{-19}}$

$n=0.625*10^{13}$

$n=6.25*10^{12}$

Therefore, the value of n is equal to  6.25 ×10¹².