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Direct electric current cannot be used to operate A. Electric motors B. Electric heaters C. Electromagnets D. Transformers?
Jcred71
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How do you deactivate an electromagnet?
Electromagnets are energized with an electric current. Turn the power off to stop the current will do the trick.
What are the advantages of electromagnets against normal magnets?
Electromagnets' magnetism can be manipulated. Electromagnets can be magnetised and demagnetised by passing electric current. Therefore they are used in motors- which works when the coil is magnetised by passing an electric current. It is also used for cranes.
How is an electric magnet made?
An electromagnet can be made simply. When an electric current flows in a wire it creates a magnetic field around the wire. By winding the wire into a coil we can strengthen the magnetic field. Electromagnets are made from coils like this.
What does electric current produce?
A electric current produces a magnetic field
Is electric current scaler or vector quantity?
Electric current is a scalar.
What is needed to produce electromagnets?
electric current
Is a flow of electromagnets called an electric current?
Yes this true!
Acids conduct electric current by forming what?
By direct from the manufacturer! Current & Potential Transformers
How do you deactivate an electromagnet?
Electromagnets are energized with an electric current. Turn the power off to stop the current will do the trick.
Who would need to utilise current transformers?
A current transformer is used for measurement of alternating electric currents. Current transformers, together with voltage transformers are known as instrument transformers.
Explain the temporary nature of electromagnets?
Electromagnets have temporary nature because if you take away their electric current, the magnet no longer works.
Can electromagnets be turned off by opening an electric circuit?
True.. Yes, they operate by turning the current on and off
What is the difference between electromagnets and electric generators?
Really oversimplifying it: an electromagnet converts electric current to a magnetic field and an electric generator converts mechanical rotation to an electric voltage. An electromagnet has no moving parts while an electric generator is composed of a stationary part called the "stator" and a rotating part called the "rotor". An electric generator may contain either permanent magnets or electromagnets, depending on the type of generator.
How are step-up and step-down transformers used in the transmission of electric current from the electric company to homes?
(This is what my teacher said, I wrote this down in my notes) The answer is, Step-up transformers are used to increase the voltage of an electric current before it is sent out over transmission lines from the electric company. Step-down transformers are used to reduce the voltage of current from high-voltage transmission lines before it enters homes and businesses. Some devices, such as televisions, contain step-up transformers that increase the voltage once again.
Do electromagnets Produce Non Renewable Or Renewable Energy?
Electromagnets do not produce energy at all. They require an electric current to make them work so they are consumers of energy.
How electric current of high voltage made suitable for household consumption?
The voltage is reduced, in Transformers.
How is electric current of high voltage made suitable for household consumption?
The voltage is reduced, in transformers.
