Find answers to your questions faster and easier with IDNLearn.com. Ask your questions and get detailed, reliable answers from our community of experienced experts.

The potential difference between two parallel wires in air is [tex]$120 V[tex]$[/tex]. They hold equal and opposite charges of [tex]$[/tex]7.5 \times 10^{-10} C$[/tex]. What is the capacitance of the two wires?

A. [tex]3.25 \times 10^{-7} F[/tex]
B. [tex]3.4 \times 10^{-26} F[/tex]
C. [tex]4.25 \times 10^{-6} F[/tex]
D. [tex]6.25 \times 10^{-12} F[/tex]


Sagot :

Sure! Let's solve this step by step.

1. Understanding the given values:
- The potential difference (V) between the two wires is \(120\, \text{V}\).
- The charge (Q) on the wires is \(7.5 \times 10^{-10}\, \text{C}\), wherein they hold equal and opposite charges.

2. Applying the formula for capacitance:
- The capacitance (C) of a system can be calculated using the formula:
[tex]\[ C = \frac{Q}{V} \][/tex]
- Here, \(Q\) is the charge and \(V\) is the potential difference.

3. Substitute the given values into the formula:
- \(Q = 7.5 \times 10^{-10} \text{ C}\)
- \(V = 120 \text{ V}\)

Substituting these:
[tex]\[ C = \frac{7.5 \times 10^{-10} \text{ C}}{120 \text{ V}} = 6.25 \times 10^{-12} \text{ F} \][/tex]

4. Comparing with the multiple-choice options:
- Now, we compare the calculated capacitance \(6.25 \times 10^{-12} \text{ F}\) with the given options:
- \(3.25 \times 10^{-7} \text{ F}\)
- \(3.4 \times 10^{-26} \text{ F}\)
- \(4.25 \times 10^{-6} \text{ F}\)
- \(6.25 \times 10^{-12} \text{ F}\)

- The correct match is \(6.25 \times 10^{-12} \text{ F}\).

Therefore, the capacitance of the two wires is [tex]\(\boxed{6.25 \times 10^{-12} \text{ F}}\)[/tex].