一个烤面包机设备如何转换的一个例子t electrical currents into heat energy. The toaster is plugged into the electrical outlet and electricity flows through the cord and into the heating elements of the toaster. The toaster than warms and crisps the food item placed inside. The heating coils warm the bread as a result of electrical currents being transferred.

Lightning is a powerful example of electricity in nature. During a thunderstorm, many small bits of ice bump into each other as they move around in the air in the clouds. These collisions create an electric charge. The cloud fills up with electrical charges. The positive charges or protons form at the top of the cloud, and the negative charges or electrons form at the bottom of the cloud. The ground beneath the cloud creates a positive charge. The charge coming up from points on the ground (like treetops or buildings) eventually connects with a charge reaching down from the clouds and lightning strikes.

Juan should use copper if he is looking for something that is a good conductor. A conductor is a material that transmits energy. Electrons can flow easily through a conductor. If he chooses the rubber, wood, or plastic, those items are insulators and would prevent the flow of energy because electrons cannot flow easily through an insulator. Electricity is the flow of electrons – tiny negatively charged particles in atoms, so their flow mustn't be hindered.

Energy can be moved from place to place by moving objects or through sound, light, or electric currents. Energy can also be transferred from site to site by electric currents; the currents may have been produced, to begin with by transforming the energy of motion into electrical energy. The statement presented is false because electrical currents can transfer energy.

All of thee examples except for one demonstrate electricity or electrical currents transferring energy in a simple household scenario. Lighting a candle when the power goes out to provide light does not use electricity or an electrical current, so it is the non-example. A candle does produce light and heat energy, but it is through a chemical reaction with the match lighting the wick. All of the other examples are creating a change using electricity.

Because electricity is the flow of electrons, or negatively charged particles in atoms, conductors are necessary when trying to transfer energy through electrical currents. Conductors allow electrons to flow easily, which in turn transmits energy. Someone would not want to block electrons from traveling whatsoever when trying to create an electrical current - materials that do this would be called insulators.

Insulators slow down the flow of electrons, which prevents the transfer of energy through electrical currents. For electrical currents to function correctly, the negatively charged particles must be able to flow easily. A conductor would assist in the transfer of energy through electrical currents, while insulators stop it from happening.

These responses show a number of different energy transfers. A bubbling cauldron would be an example of a transfer of heat energy. A professor walking the halls with a candle is an example of light energy at work. The thrown broomstick depicts kinetic energy. The lightbulb turning on is an example of a transfer of electrical energy, because electricity causes the wire in the bulb to glow.

穿越热对流、传导和radiation. While both heat energy transfers and electrical energy transfers require good conductors, in a heat energy transfer, the particles begin vibrating and bumping into one another more and more quickly, spreading heat. Electrical currents require electrons to travel through wires or a reaction between positive and negatively charged particles.

Electrons are negatively charged particles, while protons are positively charged. Electrons are the primary carriers of electricity in solid objects.