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Electrostatics

Electrostatics is the branch of physics that deals with the study of charges at rest. A common electrostatic phenomena is plastic wrap sticking to your hand and itself when removed from the box. Everything to do with electrostatics goes in this category.

1,860 Questions

Why is it easier to charge polythene by rubbing but not copper?

Polythene has a higher tendency to gain electrons from other materials due to its structure, making it easier to become negatively charged when rubbed. Copper, on the other hand, has a more stable electron configuration and lower affinity for gaining or losing electrons, making it harder to charge through rubbing.

Which charge does ebonite rod acquire when rubbed with woollen cloth?

The ebonite rod acquires a negative charge when rubbed with woolen cloth because electrons are transferred from the woolen cloth to the ebonite rod.

Why is it important to ground static electricity?

Because of the electric force and stuff and the magnitude and lattitude that pulls it across the system of rods

Why would current electricity be more useful than static electricity?

Current electricity is more useful than static electricity because it can be easily controlled, harnessed, and transported over long distances to power devices and machinery. Current electricity is what powers most of our everyday technology and allows for the generation of light, heat, and motion. In contrast, static electricity is more unpredictable and primarily limited to causing shocks or attracting small objects.

What will happen when you rub a balloon with a cloth?

Rubbing a balloon with a cloth can create static electricity on the surface of the balloon. This can cause the balloon to stick to objects or attract small items like pieces of paper.

Would a negatively charged balloon stick to a metal rod?

No. It is not possible. Because as soon as balloon touches the metal charges would be conducted.

Do Nalgene lab bottles conduct any static charge?

Nalgene lab bottles are generally made of high-density polyethylene (HDPE) or polypropylene, which are non-conductive materials. This means that Nalgene lab bottles typically do not conduct static charge.

How Can static electricity can be useful?

Here are some examples of how static electricity is useful:

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, sticks to the car, and is attracted to all the hard-to-reach areas.

Electrostatic precipitator: In a coal-fired power station, this is used to stop the dust particles reaching the atmosphere. Particles pass through a charged grid and become charged. They then stick to 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 loses its charge. This leaves charge where there needs to be ink. Ink is then pulled onto the charged drum and transferred onto paper.

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

What isolated conductor?

A conductor is not a wire or something, but it is a metallic object. it can store charge on it's surface. if it is connected to any other system which can dissipate or store energy, then it is not isolated. otherwise it is isolated.

Static electrcity is electrons that are not moving?

Static electricity is the imbalance of electric charge on an object, where electrons are either accumulated or depleted. It is called "static" because the charge remains in one place until it is discharged. Movement of electrons is not necessarily absent in static electricity, but rather the charge is stationary.

Which of these is an example of static electricity-?

Explanation of Materials that Cause Static Electricity. ... "Flyaway hair" is a good example of having a moderate positive (+) charge. Nylon. Wool. Lead ... It is surprising that these metals attract electrons almost as much as polyester. Polyester.

What is called electricity at rest?

Electricity at rest is called static electricity, which occurs when positive and negative charges build up on objects without flowing in a current. This can lead to phenomena like sparks, lightning, and the attraction of small objects through static cling.

How many volts of electricity is emitted from the primary corona wire to place the charge on the drum during the conditioning phase?

The voltage applied to the corona wire in a xerographic copier or printer varies depending on the manufacturer and model, however, it is a high voltage. On the other hand, that voltage is applied but is not emitted. It is a static electrical voltage and does not go anywhere (there is no effective current)

HOW DO YOU DISCHARGE ELECTRICITY?

If you touch the charged item to the ground, the charge will go into the ground. This is because static electricity is caused by either having too many or not enough elecrons. When toughed to the ground, the item will either get rid of the electrons or pick more up, making it neutral.

Why tangential componenet of electric field is zero in pure conductor?

In a pure conductor, charges are free to move and distribute themselves in a way that cancels out any tangential electric field within the conductor. This is due to the fact that charges will rearrange themselves to minimize the electric potential and achieve electrostatic equilibrium. As a result, the tangential component of the electric field inside a conductor is zero.

Why we use electrostatic discharge?

Electrostatic discharge (ESD) is used to prevent damage to electronic components or devices. ESD can occur when static electricity builds up and discharges through an object, potentially causing harm if not properly managed. By grounding components or using ESD-safe materials, the risk of damage due to ESD can be minimized.

Why does polythene have a negative charge with a cloth?

When polythene is rubbed with a cloth, electrons are transferred from the cloth to the polythene, causing the polythene to become negatively charged. This transfer of electrons creates an imbalance of charges between the two materials, resulting in the polythene having a negative charge.

How do defibrillators use static electricity?

Defibrillators use static electricity to deliver an electric shock to the heart in order to restore normal heart rhythm in cases of cardiac arrest. The device generates a high-voltage charge that is discharged through the heart, allowing the heart muscle to contract in a coordinated manner and resume pumping blood effectively.

When objects gain or lose electrons they become static electricity?

When objects gain or lose electrons, they can build up an imbalance of electric charge, resulting in static electricity. This imbalance can cause objects to attract or repel each other, leading to static discharges when the charges equalize.

What involves the movement of electrons in neutral objects due to the eltric field produced by a charged object?

Static electricity involves the movement of electrons in neutral objects due to the electric field produced by a charged object. The neutral object becomes charged when it gains or loses electrons through the process of electron transfer.

Does Powderrcoating use static Electricity?

Yes, powder coating involves the use of an electrostatic charge to apply a dry powder onto a conductive surface. The powder particles are given a negative charge, which attracts them to the positively charged metal object, creating a more efficient and even coating.

How is static electricity is used in a photocopying?

Static electricity is used in photocopying to attract toner particles to the photoreceptive drum, which holds an electrostatic charge. When the drum comes into contact with the paper, the toner particles transfer onto the paper, creating a copy of the original document.

Does a glass rod rubbed with silk become negatively charged?

when a glass rod is rubbed with silk cloth, some of the electrons are removed from the atoms of the glass rod and deposited on the silk leaving negatively carged and glass positively charged

Different materials have different electron affinities, meaning electrons will tend to gravitate towards certain materials over others. When silk is rubbed against a glass rod, the atoms of the rod and the atoms of the silk interact, and the silk atoms pull electrons from the rod's atoms. Thus, the silk winds up negatively charged and the rod becomes positively charged.

Source: http://www.physicsclassroom.com/class/estatics/u8l2a.cfm

Why and when does a current carrying conductor kept in a magnetic field experiences a force list factor on which the direction of this force depend State the rule which may be used to determine the di?

Current carrying conductor will have magnetic lines around it. So when it is kept perpendicular to the magnetic field then the force would be maximum. The force depends on

1. magnitude of current

2. Magnetic field induction

3. Angle between the direction of current and magnetic field.

Fleming's Left hand rule is used to find the direction of force acting on the rod

How is the charge distributed on a non-spherical conductor?

Charge density would be more where the curvature is more. So pointed surface would have max charge density. Hence there is a chance of electrical discharge at the sharp points. This is known as Corona Discharge or Action of Points