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Tag: current

Electricity and Magnetism -Magnetism

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Electricity and Magnetism -Magnetism

When an electric current flows through a coil of wire, a magnetic field is produced. This relationship between electricity and magnetism is called electromagnetism. The magnetism of an electromagnet can be controlled by switching the electric current on or off. Electromagnets are used in many devices including computers, doorbells, and cranes that pick up heavy […]

Electric Potential, Current, and Resistance

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Hey it’s professor, Dave let’s learn about electric potential. We now know about the electric force and the electric fields that propagate this force, so how is this useful to humans? To answer this we must understand that just as there is gravitational potential energy by virtue of an object’s position in a gravitational field, […]

Static and Current Electricity – For Teachers

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Static and Current Electricity – For Teachers

Hi. My name is Melissa. I’m a scientist here at Science North. And I’m here to talk to you today a little bit about electricity. Now, what exactly is electricity? Electricity is a force driven by electric charges. Now, electric charges can come in both positive and negative forms. When we have charges that are […]

Electricity Can Kill You!

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Electricity Can Kill You!

Some friends ask: “Isn’t it the electrical current that kills you?” Well yes, but the voltage needs to be high enough to generate enough current. Something that’s capable of generating hundreds of amps doesn’t necessarily hurt you. For example, a capacitor like this one can generate a lot of current. And right now it’s charged […]

Generating Electricity

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We get electricity by changing other forms of energy. For example, we can burn coal or some other fuel which changes chemical energy into thermal, or heat, energy. The heat energy will cause water to heat and move in a tank. Energy of motion is kinetic energy. The kinetic energy in the water causes a […]

PCB Transformer with LED,s working with static electricity

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PCB Transformer with LED,s working with  static electricity

The transformer can not operate just as it sits at a source of invariable static electricity or is charged. there must be a varying current through it Static electricity creates a current flow only in several ways. At a time of discharge or when the electric field is changed fast. for this experiment, the high-impedance […]

Top Inventions of Nikola Tesla! Inventor of modern electricity!

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Top Inventions of Nikola Tesla! Inventor of modern electricity!

Nikola Tesla was a Serbian American inventor who lived from July 1856 to January 1943 perhaps you have not heard of him by name but you will have undoubtedly heard of his many inventions so let’s look at the top inventions of Nikola Tesla see how many of these inventions you still use today number […]

1. Physics | Current Electricity | Resistance of a Conductor with Varying Cross-Section

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1. Physics | Current Electricity | Resistance of a Conductor with Varying Cross-Section

here in this illustration, we’ll discuss about the resistance of a conductor with varying cross section. here you can see the figure shows a conductor of length l. and having a cross section which is varying. and, the radius of cross section varies linearly from, radius ay to b. and the resistivity of material given […]

19. Physics | Current Electricity | Equivalent Resistance of an Infinite Grid | Ashish Arora

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19. Physics | Current Electricity | Equivalent Resistance of an Infinite Grid | Ashish Arora

in this illustration we’ll demonstrate you how to calculate the equivalent resistance of an infinite grid. here the figure shows an infinite wire grid with square cells, and the resistance of each wire between neighboring junction is r. and here we are required to find the equivalent resistance of the grid across these 2 points, […]