# Potential difference Calculation

• Tan_Can
In summary, potential difference, also known as voltage, is the measure of the difference in electric potential energy between two points in an electric circuit. It is calculated by dividing the change in potential energy by the charge that moves through the circuit and is measured in volts. The main factor that affects potential difference is the amount of charge moving through the circuit. It can be measured using a voltmeter and the unit of measurement is the volt.
Tan_Can
I am stuck on this question about potential difference, the question is: each side of an equilateral triangle measures 3.61cm. A charge of -0.34mC is placed at each vertex. what is the potential difference at the midpoint of the base of the triangle, i need quick help. Thank you.

Last edited:

The potential difference at the midpoint of the base of the triangle can be calculated by using the formula V = kq/r, where V is the potential difference, k is the Coulomb's constant (9x10^9 Nm^2/C^2), q is the charge (-0.34mC), and r is the distance from the charge to the midpoint of the base.

First, we need to find the distance from the charge to the midpoint of the base. Since the triangle is equilateral, the distance from each vertex to the midpoint of the base is half of the length of the side, which is 3.61/2 = 1.805 cm.

Now, we can plug in the values into the formula:

V = (9x10^9 Nm^2/C^2)(-0.34x10^-3 C)/(1.805x10^-2 m) = -5.02 V

Therefore, the potential difference at the midpoint of the base is -5.02 volts. This means that a positive charge placed at this point would experience a force of 5.02 volts pushing it towards the negative charges at the vertices of the triangle. I hope this helps!

## 1. What is potential difference?

Potential difference, also known as voltage, is the measure of the difference in electric potential energy between two points in an electric circuit. It is measured in volts (V) and is represented by the symbol ΔV.

## 2. How is potential difference calculated?

Potential difference is calculated by dividing the change in potential energy (ΔPE) by the charge (q) that moves through the circuit, according to the equation ΔV = ΔPE/q. This can also be represented as V = IR, where V is the potential difference, I is the current, and R is the resistance.

## 3. What factors affect potential difference?

The main factor that affects potential difference is the amount of charge moving through the circuit. However, other factors such as the type and length of the conductor, the temperature, and the presence of any resistors can also affect the potential difference.

## 4. How is potential difference measured?

Potential difference can be measured using a voltmeter, which is a device that is connected in parallel to the circuit. The voltmeter measures the potential difference by measuring the electric potential energy per unit charge between two points in the circuit.

## 5. What is the unit of measurement for potential difference?

The unit of measurement for potential difference is the volt (V). It is named after the Italian physicist Alessandro Volta, who invented the first battery. Other common units for potential difference include kilovolts (kV) and millivolts (mV).

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