Properties of Charges: Practice Problem & Solution

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Properties of Charges. Understanding the underlying formula is key to arriving at the correct answer below:

To determine the deficiency of electrons for a body with a charge of

$10^{-12} \, \text{C}$

, follow these steps:

1. Charge of a single electron: The charge of one electron is
   $e = 1.6 \times 10^{-19} \, \text{C}$ 

   .

2. Number of electrons (deficiency): The total number of electrons causing the charge is given by: 

   $$n = \frac{\text{Total charge}}{\text{Charge of one electron}} = \frac{10^{-12}}{1.6 \times 10^{-19}} = 6.25 \times 10^{6}.$$ 

3. Interpretation: Since the body is positively charged, it has a deficiency of
   $6.25 \times 10^6$ 

   electrons.