The number of electrons present in -1 C of charge is

Options

A. `6.25xx10^(18)`
B. `1.6xx10^(19)`
C. `6xx10^(19)`
D. `1.6xx10^(18)`

Explanation

To find the number of electrons present in a charge of -1 C, we can follow these steps:

### Step 1: Understand the charge of one electron
The charge of a single electron is approximately \( e = -1.6 \times 10^{-19} \) coulombs.

### Step 2: Calculate the number of electrons in 1 coulomb
To find the number of electrons that make up a charge of 1 coulomb, we can use the formula:

\[ \text{Number of electrons} = \frac{\text{Total charge}}{\text{Charge of one electron}} \]

Substituting the values we have:

\[ \text{Number of electrons} = \frac{1 \, \text{C}}{1.6 \times 10^{-19} \, \text{C/electron}} \]

### Step 3: Perform the calculation
Calculating the above expression:

\[ \text{Number of electrons} = \frac{1}{1.6 \times 10^{-19}} \approx 6.25 \times 10^{18} \]

### Step 4: Consider the negative charge
Since we are looking for the number of electrons in -1 C of charge, we note that the number of electrons will be the same in magnitude but we are dealing with a negative charge. Thus, the number of electrons in -1 C is also:

\[ \text{Number of electrons in -1 C} = 6.25 \times 10^{18} \]

### Final Answer
The number of electrons present in -1 C of charge is \( 6.25 \times 10^{18} \).

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