In which case or cases is electric field present?

Question: In which case or cases is electric field present?

An electric field is present in any situation where there is an electric charge. This includes:

• The presence of charged particles: Electric charges are the source of electric fields. Any object with an electric charge, such as an electron or a proton, will create an electric field around it.

• The changing of a magnetic field: A changing magnetic field can also create an electric field. This is because a changing magnetic field produces an electromotive force (EMF), which is a voltage that can cause a current to flow in a conductor.

Here are some specific examples of situations in which an electric field is present:

• A charged comb: When you comb your hair, you can sometimes see sparks fly. This is because the comb has become electrically charged due to friction with your hair. The charged comb creates an electric field around it, and when the field is strong enough, it can cause air molecules to ionize and produce sparks.

• A lightning bolt: Lightning is a natural discharge of electricity that occurs when there is a buildup of static electricity in the atmosphere. The buildup of static electricity creates an electric field between the clouds and the ground, and when the field is strong enough, it can cause the air to break down and produce a lightning bolt.

• A power line: Power lines carry electricity, which means that they have an electric field around them. The electric field is strongest near the power lines, and it weakens as you get farther away.

• A television: A television produces an electric field that is used to transmit the image to the screen. The electric field is created by the electrons in the cathode ray tube, and it is modulated by the video signal.

• A computer: A computer contains many electrical components, such as transistors and capacitors, which create electric fields. These electric fields are used to store and process information.

In general, an electric field is present whenever there is an electric charge or a changing magnetic field. Electric fields can be strong or weak, and they can have a variety of effects on objects that are placed in them.

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