# Force between parallel plates in a capacitor

• asi123
In summary, the force between parallel plates in a capacitor is the electrostatic force caused by opposite charges on the plates. It can be calculated using the equation F = QEd, where F is the force, Q is the charge on the plates, E is the electric field, and d is the distance between the plates. The force is directly proportional to the distance between the plates and the charge on the plates. It can be either attractive or repulsive, depending on the type of charges on the plates.
asi123

## Homework Statement

Hey guys.
So, I got this problem.
According to their hint I'm suppose to calculate the work of moving one of the plates and from their, get to the force.
I don't have a clue how to do that. I can't find a single formula that can help with that.
Can I please have some help...?

Thanks.

## The Attempt at a Solution

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Here. You can watch the first part of this lecture:

In a capacitor, there are two parallel plates separated by a distance d. When a potential difference (voltage) is applied between the plates, an electric field is created between them. This electric field exerts a force on the charges present on the plates, causing them to move.

To calculate the force between the plates, we can use the formula F = qE, where F is the force, q is the charge on the plate, and E is the electric field strength.

To find the electric field strength, we can use the formula E = V/d, where V is the potential difference (voltage) and d is the distance between the plates.

Now, to calculate the work done in moving one of the plates, we can use the formula W = Fd, where W is the work done, F is the force, and d is the distance moved.

Once we have calculated the work done, we can use the formula W = qV, where W is the work done, q is the charge on the plate, and V is the potential difference (voltage).

By equating these two equations, we can find the force between the plates, which is given by F = qV/d.

I hope this helps with your problem. Remember, in physics, it's important to use the correct formulas and units to get the right answer. Good luck!

## 1. What is the force between parallel plates in a capacitor?

The force between parallel plates in a capacitor is the electrostatic force that acts between the positively and negatively charged plates. This force is a result of the electric field created by the opposite charges on the plates.

## 2. How is the force between parallel plates in a capacitor calculated?

The force between parallel plates in a capacitor can be calculated using the equation F = QEd, where F is the force, Q is the charge on the plates, E is the electric field, and d is the distance between the plates.

## 3. Does the distance between the plates affect the force between them?

Yes, the force between parallel plates in a capacitor is directly proportional to the distance between the plates. This means that as the distance between the plates increases, the force decreases and vice versa.

## 4. How does the charge on the plates affect the force between them?

The force between parallel plates in a capacitor is directly proportional to the charge on the plates. This means that as the charge on the plates increases, the force also increases and vice versa.

## 5. Is the force between parallel plates in a capacitor always attractive?

No, the force between parallel plates in a capacitor can be either attractive or repulsive, depending on the type of charges on the plates. If the plates have opposite charges, the force will be attractive. If the plates have the same charge, the force will be repulsive.

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