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At what distance from a [tex]$1.00 \times 10^{-5}$ C[/tex] charge will the electric potential be 10000 V?

(Unit: m)


Sagot :

Certainly! Let's find the distance from a charge of [tex]\(1.00 \times 10^{-5}\)[/tex] Coulombs where the electric potential is 10000 Volts.

First, let's recall the formula for electric potential [tex]\(V\)[/tex] at a distance [tex]\(r\)[/tex] from a point charge [tex]\(q\)[/tex]:

[tex]\[ V = \frac{k \cdot q}{r} \][/tex]

where:
- [tex]\(V\)[/tex] is the electric potential in Volts (V),
- [tex]\(k\)[/tex] is Coulomb's constant, approximately [tex]\(8.99 \times 10^{9} \, \text{N m}^2/\text{C}^2\)[/tex],
- [tex]\(q\)[/tex] is the charge in Coulombs (C),
- [tex]\(r\)[/tex] is the distance from the charge in meters (m).

We need to solve for [tex]\(r\)[/tex]. Let's rearrange the formula to isolate [tex]\(r\)[/tex]:

[tex]\[ r = \frac{k \cdot q}{V} \][/tex]

Now, we can substitute the given values into the equation:
- [tex]\(q = 1.00 \times 10^{-5} \, \text{C}\)[/tex]
- [tex]\(V = 10000 \, \text{V}\)[/tex]
- [tex]\(k = 8.99 \times 10^{9} \, \text{N m}^2/\text{C}^2\)[/tex]

Substituting these values:

[tex]\[ r = \frac{8.99 \times 10^{9} \, \text{N m}^2/\text{C}^2 \times 1.00 \times 10^{-5} \, \text{C}}{10000 \, \text{V}} \][/tex]

Performing the multiplication in the numerator:

[tex]\[ 8.99 \times 10^{9} \times 1.00 \times 10^{-5} = 8.99 \times 10^{4} \][/tex]

Next, divide by 10000 V:

[tex]\[ r = \frac{8.99 \times 10^{4}}{10000} \][/tex]

[tex]\[ r = 8.99 \, \text{m} \][/tex]

Therefore, the distance from a [tex]\(1.00 \times 10^{-5} \, \text{C}\)[/tex] charge where the electric potential is 10000 V is accurately calculated to be:

[tex]\[ r \approx 8.99 \, \text{m} \][/tex]