Electrostatics

When exposed to a magnetic field, materials with iron, such as paper clips, can temporarily become magnets. This occurs because the magnetic field aligns the magnetic domains within the material, creating a temporary magnetic force. Once the external magnetic field is removed, the material loses its magnetic properties.

developed in the 1780s by French physicist Charles Augustin de Coulomb The magnitude of the electrostatic force between two point electric charges is directly proportional to the product of the magnitudes of each charge and inversely proportional to the square of the distance between the charges. F = k q1q2 \ d2 As F is electric force

k is coulomb's constant = 9*10^9 Nm^2\C^2

q1 and q2 are the charges measured in coulombs d is the distance between them measured in meters

while running, a slip ring induction motor ,it got tripped and found 2 nos power fuses blown out.on inspection rotor winding IR value zero.ie after releasing the brushes. how it happens?. pl ans

when the motor is starting its an induction motor with a squirrel cage

while its getting up to speed the voltage across the slip rings will be very high

there is a field resister shorting the rings this is removed and replaced with dc

with a make before break field application relay

if the dc is applied before the motor is up to near synchronous speed the stator will need to have very high current to accelerate the mass of the machine

sometimes the controls are magnetic

sometimes a centrifugal switch

sometimes a timer

a compressor will have an unloader to minimise load on the motor before the dc is applied

however this is done

if dc is on the field before you get close to operating speed you will blow fuses

if the "failure" happened while running it could be a momentary power interruption or a momentary load interruption

if the controls didnt see it and restart the motor

you can dissect the fuses and see weather you had a short or an overload

or add a bit more detail about the equipment and incident

Electrical currents can flow readily through conductive materials such as metals like copper, aluminum, and gold. These materials have a high density of free electrons that can easily move in response to an electric field, allowing for the flow of electricity.

Yes, static electricity refers to electrical charges that are not flowing as a current, but rather remain stationary on an insulating material or object. This buildup of charge occurs when certain materials rub against each other, causing electrons to transfer and create an imbalance of positive and negative charges.

The attractive force between two point charges decreases with the square of the distance between them. So, if the distance is doubled (from 12cm to 24cm), the force will decrease by a factor of 4. Therefore, at a separation of 24cm, the attractive force will be 5N.

Static electricity is a build up of positive and negative electrons that get close enough to interact with each other briefly. This leads to you getting a small shock if you say rub your feet in wool socks against carpet and then touch something metal. However the electrical charge in these reactions is very small, and there is no sustained current.

The electricity in a light bulb is a continuously flowing current, so long as it's switched on. That heats a filament in the bulb that reacts to the gas in the vacuum of the bulb.

The concepts are effectively similar except one part. Static is just a built up charge that is released. While the light bulb is a continuous flow of electricity so long as the light is turned on.

In an electromagnetic wave, the phase difference between the electric and magnetic fields is 90 degrees. This means that when the electric field is at its maximum value, the magnetic field is zero, and vice versa. This relationship is essential for understanding how electromagnetic waves propagate through space.

Electrostatic painting is a method of painting that uses a process of charging particles, usually in the form of paint droplets, and then using an electrical field to draw them towards a grounded object. This method is often used to paint metal surfaces.

The process works by first charging the paint particles, typically by passing them through an electrostatic field. This causes the particles to become positively charged and then attracted to a negatively charged object, such as a metal surface. The object being painted is then connected to an electrical ground, which causes the positively charged paint particles to be drawn towards it. This process allows for an even coating of the paint particles on the object.

The main advantage of electrostatic painting is that it provides an even coating of paint over the entire surface of the object being painted. This is often not achievable with hand painting, as the paint may not be evenly applied. Additionally, electrostatic painting often requires less time and labor than hand painting, resulting in cost savings.

The main disadvantage of electrostatic painting is that it requires specialized equipment and often requires special safety protocols. Additionally, electrostatic painting can be dangerous if not done properly and can cause burns, fires, and explosions if the equipment is not handled correctly. Additionally, electrostatic painting can be expensive and can be difficult to clean up if not done properly.

The electric potential energy of given configuration of charges is defined as the work which must be done against the Coulomb force to rearrange charges from infinite separation to this configuration (or the work done by the Coulomb force separating the charges from this configuration to infinity). For two point-like charges Q1 and Q2 at a distance r this work, and hence electric potential energy is equal to:

E_mathrm{p,e} = frac{1}{{4piepsilon_0}}{{Q_1Q_2}over{r}}

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Yes, yes, undoubtedly correct. But what is an electrostatic force ?

Atraction between two opposite forces

Anti static mat

Both positive and negative charges can create static electricity. When certain materials are rubbed together, electrons can be transferred from one material to another, resulting in an imbalance of positive and negative charges and the buildup of static electricity.

Static electricity builds up when two different materials rub against each other, causing electrons to transfer from one material to the other. This results in one material becoming positively charged and the other becoming negatively charged. When the charged materials come into contact with each other or with a conductor, the excess charge is transferred, creating a spark or causing objects to stick together.

Benjamin Franklin is the American scientist who used a kite to demonstrate static electricity. He flew a kite during a thunderstorm, which led to the discovery of electricity in lightning.

"Zapping Zeal: Exploring Electrostatic Force"

Rubbing two balloons together with felt will create static electricity. The friction between the balloons and the felt causes the transfer of electrons, resulting in one balloon becoming positively charged and the other negatively charged. As a result, the balloons will either repel or attract each other due to their opposite charges.

The charge on the professor's suit would be negative, as electrons are negatively charged particles found in an atom's outer electron cloud. When moving away from the nucleus, electrons gain potential energy and their charge remains constant.

There is no attraction between two like-charged things. Instead, repulsion between the things take place.

When an object receives a negative charge, there is no change in its mass. Mass is a fundamental property of matter that is not affected by the addition or removal of charge. The negative charge simply alters the distribution of electrons on the object's surface.

This phenomenon is known as overproduction or oversupply, where plants and animals produce more offspring than the environment can support, leading to competition for resources and a struggle for survival.

Sure! Here is an acrostic for static electricity:

Sprinting electrons Tangling through objects Attracting and repelling Tingling sensations Ionized charges Crackling sounds in the air.

Atoms contain both positive (protons) and negative (electrons) electric charges. But in the vast majority of atoms these positive and negative electric charges balance, canceling and resulting in zero total electric charge.

When electrons detach from atoms we generate electricity. Where there are fewer electrons there is a positive charge. Where there are more electrons there is a negative charge. When two places have different charges we get an electric voltage. When electrons flow from a negatively charged place to a positively charged place we get an electric current.

You are most likely to build up enough static charge to receive a shock in dry environments, such as during cold and dry winter months when humidity levels are low. Walking on carpets or wearing rubber-soled shoes can also increase the likelihood of building up static charge.

Rubbing the balloon against your dry hair transfers electrons from your hair to the balloon, giving the balloon a negative charge. When you then place the negatively charged balloon against the wall, it creates an attraction with the positive charges in the wall, causing the balloon to stick due to static electricity.