# Physics Grade 12 Electricity (WHAT DID I DO WRONG)

• baller2353
In summary, the conversation discusses a question involving Coulomb's constant, the charge and rest mass of protons and electrons, and the equations needed to solve the problem. The question involves finding the acceleration, electric field, and voltage across parallel plates in a given scenario. The person asking for help has made a mistake in their attempt at solving the question and is seeking clarification. The correct equation and steps to solve the question are provided.

## Homework Statement

Constants Given
Colombs constant = 9 x 10^9
Charge of Proton = 1.6 x10^-19
Proton rest mass=1.673 x 10-27
Charge of electron = -1.6 x 10^-19
Electron Rest Mass = 9.11 x 10^-31 kg

## Homework Equations

On the attachement

## The Attempt at a Solution

On the attachement

Can anyone tell me what i did wrong in my attempt to solve the question.

#### Attachments

• 5.jpg
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That red mark sure isn't clear! It does indicate that Vi*t = 0 but not that half the solution has been left out.
You have for the vertical part of the motion
d = Vi*t + ½*a*t²
The Vi vertically is zero, so forget the Vi*t. The next line should read:
.01 = ½*a*(5x10-⁹)²
That should be solved for the acceleration.
Then, use that value to calculate the vertical force, electric field and finally the voltage across the parallel plates that causes the electric field that causes the force on the electron.

## 1. What is electricity in physics?

Electricity in physics refers to the flow of electric charge or the movement of electrons. It is a form of energy that is essential for many everyday functions, such as powering appliances and devices.

## 2. How is electricity measured in physics?

Electricity is measured in physics using units such as volts (V), amps (A), and ohms (Ω). These units represent the amount of voltage, current, and resistance in an electrical circuit, respectively.

## 3. What is the difference between AC and DC electricity in physics?

In physics, AC (alternating current) electricity is a type of electrical current that periodically reverses direction, while DC (direct current) electricity always flows in the same direction. AC is commonly used in household outlets, while DC is used in batteries and electronic devices.

## 4. What are the main components of an electrical circuit in physics?

An electrical circuit in physics typically consists of a power source, such as a battery or generator, wires or conductors to carry the current, and loads, such as light bulbs or motors, that use the electricity to perform a function.

## 5. How does electricity behave in a closed circuit in physics?

In physics, electricity follows the laws of conservation of energy and charge, meaning that it will flow continuously in a closed circuit without any loss of energy or charge. This is why closed circuits are necessary for electricity to power devices and perform work.