Electrostatics

If you are an electronics hobbyist you will be handling CMOS ICs they will be damaged if you touch their legs with your hands. This is due to static electricity.

The same can happen if you don't discharge yourself before touching the motherboard of your computers. But most of today's computers are protected from this.

Powder paint uses electrostatics by charging the powder particles with an opposite charge to the object being painted. This creates an electrostatic attraction that causes the powder to adhere to the object. When the object is heated, the powder particles melt and form a smooth and durable finish.

No, the charge will not make a rectilinear motion. In a nonuniform electric field, the force on the charge will vary depending on its position, leading to a curved trajectory rather than a straight line path.

If the potential is constant through a given region of space, the electric field is zero in that region. This is because the electric field is the negative gradient of the electric potential, so if the potential is not changing, the field becomes zero.

The spark that jumps to your finger after walking on a rug is an example of static electricity. This occurs when friction between the rug and your shoes causes a build-up of electric charge that discharges when you touch a conductor, like a metal doorknob.

Inside a conducting sphere, the electric field is zero due to the symmetry of the charge distribution. Any excess charge placed inside would cause the charges to rearrange themselves in such a way that cancels out the internal field, resulting in a net charge of zero inside the sphere. This is known as the principle of electrostatic shielding.

Electrical charges can either attract or repel each other depending on their polarities. Like charges (positive-positive or negative-negative) repel each other, while opposite charges (positive-negative) attract. The strength of the attraction or repulsion is determined by the amount of charge and the distance between the charges.

Resistance is defined by R = V/I where V is potential difference and I is current.

It is not: change in pd / change in current - which would be the gradient of the curve.

Thus to measure the resistance at a particular pd we simply read off the current at that pd and use the equation above.

The problem stems from the way resistors are introduced before non-ohmic components, and for ohmic components it may appear that the gradient is being used for the resistance.

Yes, static electricity can be dangerous as it can cause sparks that can ignite flammable materials, leading to fires or explosions. Additionally, static shocks can be harmful to sensitive electronic equipment and may cause damage. It is important to take precautions to mitigate the risks associated with static electricity.

To leave an object positively charged using the induction method, start by bringing a negatively charged object close to the neutral object. This induces a temporary separation of charges, with negative charges moving to the farther side of the neutral object. Then, while the negatively charged object is still nearby, remove it, leaving the neutral object with an excess of positive charges, thereby leaving it positively charged.

This is due to electrification process. As we rub the comb along with hair, the molecues in the comb would lose some electrons to the hair. This happens due to friction. So comb due to lack of negatively charged electrons becomes positively charged. Same time hair gaining electrons becomes negatively charged.

Now as we keep this charged comb close to a bit of paper, then by electrostatic induction opposite charges here negative electrons are pulled towards it. So paper gets negative charge momentarily. Hence force of attraction between unlike charges. So paper bit gets attracted.

If a comb drawn through (dry) hair attracts a tiny piece of paper, it is almost certainly due to static electricity. We know that when some things are "rubbed" on other things, electrical charges can be displaced. A difference of potential is set up between two objects by moving charges from one object to another. And the difference of potential can, through electrostatic force, cause what is observed here.

AC (alternating current) electricity constantly changes direction and magnitude in a circuit, typically in a sine wave pattern. Static electricity, on the other hand, refers to an imbalance of electric charge on the surface of an object. AC electricity is used for powering devices and transmitting electricity over long distances, while static electricity is typically seen in everyday scenarios like when you rub a balloon on your hair.

Static electricity has no charge. This means that it doesn't move. The electrons in the wire that are pumped around the circuit by the battery do move and thus have charge. You can only use power that has a charge or "moves".

Static electricity is not caused by friction between two objects. It is the build-up of electric charge on the surface of an object due to the transfer of electrons between two materials that are in contact with each other and then separated. friction can contribute to the transfer of electrons between the materials, but it is not the sole cause of static electricity.

Electromagnets are typically made using a coil of wire carrying an electric current. The wire is often made of copper due to its high conductivity and flexibility. Additionally, a core material such as iron or steel is commonly used to enhance the magnetic properties of the electromagnet.

Did you mean "The strength of electric field is positive or negative"?

Anyway, there is your answer..

The strength of an electric field E at any point is defined as the electric force F exerted per unit positive electric charge q at that point, or E = F/q.You can say that it is positive.

The force between two charges is inversely proportional to the square of the distance between them. This means that as the distance between the charges decreases, the force between them increases, and vice versa.

The electric field intensity due to an infinite uniformly uncharged conducting plate is zero. This is because the charges within the plate are free to rearrange instantaneously to cancel out any external electric field. Therefore, outside the plate, the electric field is effectively zero.

A Van de Graaff generator is used to generate static electricity and high voltage for various experiments and demonstrations in physics. It can produce electrical charges that can be used to study electrical phenomena, test insulation materials, and accelerate particles in physics research.

Yes, static electricity can pass through wires by creating a flow of electrons. However, the ability of static electricity to pass through wires depends on the voltage and conductivity of the wire.

The process by which written or printed material is copied using static electricity is called electrostatic copying or xerography. This method involves using a photoconductive material that becomes charged when exposed to light, attracting a toner powder that is then transferred onto paper to create a copy.

Factors that affect the amount of sound energy include the amplitude of the sound wave (volume), the frequency of the sound wave (pitch), the distance from the sound source, the medium through which the sound travels, and any obstructions or barriers that may absorb or reflect the sound.

Zero. By Gauss' or Coulomb's law - eclectic field inside a conductor or a charged empty shell is always zero. If there were a field inside a sphere it would never be able to reach equilibrium with itself.