Charge on a body which carries 200 electrons is

Options

A. `-3.2xx10^(-18)C`
B. `3.2xx10^(-18)C`
C. `-3.2xx10^(-17)C`
D. `3.2xx10^(-17)C`

Explanation

To find the charge on a body that carries 200 electrons, we can follow these steps:

### Step 1: Understand the charge of a single electron
The charge of one electron is given as:
\[ e = -1.6 \times 10^{-19} \text{ coulombs} \]

### Step 2: Calculate the total charge for 200 electrons
To find the total charge for 200 electrons, we multiply the charge of one electron by the number of electrons:
\[ \text{Total Charge} = \text{Number of Electrons} \times \text{Charge of One Electron} \]
\[ \text{Total Charge} = 200 \times (-1.6 \times 10^{-19}) \]

### Step 3: Perform the multiplication
Now, we perform the multiplication:
\[ \text{Total Charge} = -200 \times 1.6 \times 10^{-19} \]
Calculating this gives:
\[ \text{Total Charge} = -320 \times 10^{-19} \]

### Step 4: Simplify the expression
We can express this in scientific notation:
\[ -320 \times 10^{-19} = -3.2 \times 10^{-17} \text{ coulombs} \]

### Final Answer
Thus, the charge on the body which carries 200 electrons is:
\[ \text{Charge} = -3.2 \times 10^{-17} \text{ coulombs} \]

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