CBSE · Class 12 · Physics · Electric Charges and FieldsTwo point charges of $+1\ \mu\text{C}$ and $-1\ \mu\text{C}$ are separated by a distance of $2\text{ cm}$. What is the magnitude of the electric dipole moment of this system?

The electric dipole moment ($p$) is given by the product of the magnitude of either charge ($q$) and the dipole length ($2a$):

$$p = q \times (2a)$$

Given:

• Charge, $q = 1\ \mu\text{C} = 1 \times 10^{-6}\text{ C}$
• Separation distance, $2a = 2\text{ cm} = 2 \times 10^{-2}\text{ m}$

Calculation: $$p = (1 \times 10^{-6}\text{ C}) \times (2 \times 10^{-2}\text{ m}) = 2 \times 10^{-8}\text{ C}\cdot\text{m}$$ \nTherefore, the correct option is $2 \times 10^{-8}\text{ C}\cdot\text{m}$.