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An electric current has three 'effects'. These are (1) heating effect, (2) chemical effect, and (3) magnetic effect.
Any one of these effects can be used to define the unit of measurement for electric current, the ampere.
Until around 1947, for example, the 'chemical effect' was used -i.e. the ampere was based on the mass of silver deposited on an electrode during electrolysis.
Since then, the 'magnetic effect' has been used -i.e. the ampere is based on the force between two current-carrying conductors, due to their surrounding magnetic fields.
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How a electric heater works 2 references?
An electric heater is a resistor that dissipates electric power when a voltage is connected across it and a current flows through it. The amount of power in watts is equal to the voltage times the current in amps. Typical space heaters for use in the home are 1.5 kW to 3 kW to heat a single room.
How many ma equal to 3 volts?
These do not convert. ma (milliamps) is a unit of electric current, while volts is a unit of voltage. They are related by Ohm's Law: V = I*R, with V is voltage (volts), I is current (amps), and R is resistance (Ohms).
Can I put an electric shower on a timer switch?
Most timer swiches are designed to operate with loads of up to 13 amps or 3 kW. Electric showers use around 8 kW (30-35 amps), so you would need a high-current timer.
What are the two things needed to make current flow in electricity?
A flow of electrons is needed to have a current. And there (usually) must be a complete circuit. And you need a voltage to make the current move around your circuit. All tied up in Ohms Law - which I'll leave to you.
Can you make a magnet without using a magnetic material Explain?
If you are referring to a magnet as an object that possesses a permanent magnetic field, then yes. There are three circumstances where magnetic fields exist, but not as a result of a permanent magnet. 1. Electric current causes a magnetic field. Thus, any wire carrying a current or even a current without a wire (like a lightning bolt) will be surrounded by a magnetic field. Since electric current is made up of moving electric charges, it is actually true than any moving electric charge creates a magnetic field. 2. It is difficult to observe outside of a scientific laboratory, but when there is an electric field that is varying in time, that creates a magnetic field. Though not easy to demonstrate directly, this turns out the physical phenomena the allows the creation of elecrtromagnetic waves, e.g. like the light we see with our eyes. 3. Thirdly, one can cause materials that are not able to work as permanent magnets to act as temporary magnets. This is the basis for electromagnets. A steel or iron core with an electric current running through a coil surrounding the core will produce a magnetic field. If you simply cut off the power source, the electric current will no longer flow through the coil. No electric current, no magnetic field. When a non-permanent magnet is created, the magnetic field it produces is just the same as the magnetic field of a permanent magnet, until the source is removed and the field disappears. All of these matters together are an essential part of the basics of electromagnetism which describes how and why the phenomena work.
What has the author Jeff Keljik written?
Jeff Keljik has written: 'Electricity 4' -- subject(s): Alternating current, Alternating current Electric motors, Electric controllers, Electric generators, Electric motors, Alternating current 'Electricity 3'
What are 3 factors which affect the magnitude of magnetic force on current-carrying conductors?
Electric current, magnetic field intensity, length of the conductor, angle between the electric current and magnetic field
What are the 3 metallic properties?
They are lustrous and malleable They conduct heat They conduct electric current
What are the 3 properties of metal?
They are lustrous and malleable They conduct heat They conduct electric current
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Kelsey's Essentials - 2010 On the Go 3-10 was released on: USA: 2012
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Kelsey's Essentials - 2010 Chocolate 3-2 was released on: USA: 2012
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The formula you are looking for is W = I x E.
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The Essentials - 2001 The Razor's Edge 12-3 was released on: USA: 10 March 2012
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Kelsey's Essentials - 2010 Sunday Dinner 3-4 was released on: USA: 2012
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Kelsey's Essentials - 2010 Urban Farming 3-8 was released on: USA: 2012
