Electrostatics

When a metal rod is rubbed against a polythene bag or sweater, the rod becomes charged with static electricity. The metal rod may be attracted to the polythene bag or sweater due to the opposite charges present on each material.

It is possible to define an electrostatic potential in a region of space with an electrostatic field because the potential is a scalar field that describes the energy per unit charge at a point in space due to the presence of a source charge distribution. This potential provides a convenient way to describe the behavior of the electric field in that region.

Static electricity is a charge built up by a range of actions like rubbing a polythene rod against a duster, we can see the effects by rubbing a balloon against our hair and the negatives will move to the balloon but will not move this is what makes static electricity different to the normal electricity in our houses, cars and other electrical items.

Static electricity and paint…

static electricity can be used by mechanics to respray cars this can be done by charging the paint negative and the car positive and the paint will arc towards it when doing this to a bike it is unnecessary to turn the bike around as the paint will coat both sides.

its the same thing one thing is charged positive and the other negative sothey will attract!

hope this helps

Paper itself is static in the sense that it does not move or change on its own. However, we can write, draw, or fold paper to create dynamic creations.

When glass is placed under paper and rubbed against silk, the friction generated can lead to the glass developing a static electric charge. This happens because the glass interacts with the silk and the paper, causing the transfer of electrons between the materials. This can result in the glass becoming negatively charged.

No. It can exert a much weaker force on neutral objects, due to an induced separation of charges - that is, the charged object will cause a separation of charges in the uncharged object, thus creating an electric dipole.

No, the Coulomb force between two charges is independent of the presence of other charges in the vicinity. The force is determined solely by the magnitude of the charges and the distance between them according to the Coulomb's law. The presence of other charges may influence the net force on the charges due to vector addition of individual forces from all charges present.

An object being pulled inward in an electric field typically implies the object has a positive charge, as oppositely charged objects are attracted to each other. If the object has a negative charge, it would be pushed away from the field. If the object has a neutral charge, it would not experience any force in the field.

You can observe static electricity in situations where friction occurs, such as when you rub a balloon on your hair and it sticks, or when you touch a metal object and feel a shock. It is also commonly seen in winter when walking on carpets or touching certain materials can generate static charge.

Paint spraying cars: the paint particles are given a negative charge, and the car frame is given a positive charge, so the paint sprays out, and sicks to the car, and is attracted to all the hard- to reach areas

Electrosatic precipitator; in coal fired power station theses are used to stop the dust particles reaching the atmosphere. Particles of gas pass through a charged grid, and becone charged. They then stick to plated either side of this grid, where they can be disposed of safely

Photocopier; A charged drum is in the photocopier. Light is then shone through the paper, and where there is no print light hits the drum and it looses its charge. This leaves charge where there needs to be ink. Ink is the pulled onto the charged drum, and transfered onto paper

Antistatic floors; to avoid static charges in hospital, the floors are made out of an antistatic material, so no charge can build up.

In order to prevent discharge into the air, the conducting sphere of the electrostatic generating machine must achieve a surface charge density sufficient to produce an electric field strength below the breakdown strength of air (typically 3 x 10^6 V/m). The minimum radius can be calculated using the formula for electric field E = k * Q / r^2, where k is the electrostatic constant, Q is the charge on the sphere, and r is the radius of the sphere. Given the charge Q = 23000 C, you can solve for r.

Static resistors are widely used in electronics to limit the flow of current in a circuit, control the voltage level, and divide voltages. They are also used for protection, filtering, and voltage regulation in various electronic devices and components. Additionally, they are commonly used in sensor circuits and as pull-up or pull-down resistors in digital electronics.

The potential energy of the particle goes down just as its kinetic energy, which results from the particle's increasing motion, increases - thereby conserving the total energy of the system.

Of course these terms refer ONLY to the potential energy due to the charged particle's presence in an electric field and its change in motion in the direction of that field. If there were also a gravitational field present and the particle had mass, it would have also have potential (and kinetic, if it's falling too) energy from that field, independently of the electric field.

Electric charge is a fundamental property of matter that cannot be created or destroyed according to the law of conservation of charge. This law states that the total electric charge in an isolated system remains constant over time. Charge can be transferred between objects, but the total amount of charge in a system always remains the same.

Metals can develop a static charge when they come into contact with other materials through processes like friction or induction. However, metals are good conductors of electricity, so any static charge they acquire would usually be quickly dissipated.

Electrostatic forces between the nucleus and outermost electrons exist due to the attraction between opposite charges. The nucleus carries a positive charge, while electrons carry a negative charge. This attraction keeps the electrons in orbit around the nucleus, creating stability within the atom.

The electric potential inside a ring conductor on a conducting paper is zero because the electric field inside a conductor in electrostatic equilibrium is zero. This is due to the charges redistributing themselves in such a way that the electric field cancels out inside the conductor. Since the electric potential is directly related to the electric field, the potential inside the conductor is also zero.

To make a physics project for class 12, start by choosing a topic that interests you, such as optics, electricity, or motion. Conduct research on the topic and gather relevant data. Design experiments or demonstrations to showcase key concepts, and present your findings in a clear and organized manner using charts, graphs, and PowerPoint presentations. Be sure to include an introduction, methodology, results, and conclusion in your project.

Static discharge head refers to the pressure at the pump discharge outlet, which is created by the pump's rotation and used to overcome the system's resistance to flow. It is a critical parameter in pump performance calculations and determines the pump's ability to push water through the system. Static discharge head is influenced by factors such as pump design, speed, and the system's piping configuration.

A dangerous use of static electricity is the risk of sparking in environments with flammable gases or vapors. The spark created by static electricity can ignite these substances, leading to fires or explosions. It is important to manage static electricity in such environments to prevent accidents.

If two negatively charged rods are brought close to each other, they will repel each other due to the like charges. The negative charges on the rods will create a force that pushes them away from each other.

When a glass rod is rubbed against a cotton duster, electrons are transferred from the glass rod to the duster. This leaves the glass rod with a net positive charge. The process is known as triboelectric charging, where materials gain or lose electrons during friction.

The bits of paper were attracted to the charged balloon because of the static electricity. This attraction caused the bits of paper to move towards the balloon.

The glass rod loses electrons when rubbed with a silk cloth. This leaves the glass rod positively charged as it loses negative electrons to the silk cloth through friction.

Silk is both excellent at insulating the charge from arcing, and at taking excess electrons, allowing the charge to build up on your object. Thus if you rub an object with out touching it directly in silk, it will progressively lose electrons and build up a static charge.