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With reference to the electromagnets, consider the following statements:
1. They are the devices that produce a magnetic field when an electric current flows through a coil of wire.
2. They can be turned on and off by controlling the electric current.
3. They are widely used in MRI machines and magnetic separation equipment.
How many of the statements given above are correct?
- a)Only one
- b)Only two
- c)All three
- d)None
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
With reference to the electromagnets, consider the following statement...
Invented in 1824 by the William Sturgeon, electromagnets are a fixture of modern life, appearing in loudspeakers, motors, magnetic resonance imaging (MRI) machines, maglev trains, and particle accelerators.
About:
- Electromagnets are devices that produce a magnetic field when an electric current flows through a coil of wire.
- The magnetic field is concentrated in the hole of the coil. The strength of the magnetic field can be controlled by adjusting the electric current. When the current is turned off, the magnetic field disappears.
- Construction and Materials: Electromagnets typically consist of a coil of wire wrapped around a magnetic core made of ferromagnetic materials like iron. The magnetic core enhances the strength of the magnetic field by aligning the magnetic domains within the core.
Properties and Advantages:
- Electromagnets can be turned on and off by controlling the electric current.
- They are more powerful than permanent magnets because the magnetic field can be amplified by the magnetic core.
- Electromagnets are widely used in various devices such as motors, generators, MRI machines, and magnetic separation equipment.
Applications:
- Electromagnets are used in various industries for tasks like lifting and moving heavy metal objects, sorting materials, and generating motion.
- They are also used in medical settings for imaging and in consumer devices like electric doorbells and card readers.
Disadvantages:
- Electromagnets require a continuous supply of electric power to maintain their magnetic field.
- They are less efficient than permanent magnets in terms of energy usage.
Hence option c is the correct answer.
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Community Answer
With reference to the electromagnets, consider the following statement...
Correct Statements about Electromagnets:
1. Statement 1: They are the devices that produce a magnetic field when an electric current flows through a coil of wire.
Electromagnets function based on the principle of electromagnetism, where the magnetic field is generated when an electric current passes through a coil of wire. This magnetic field is temporary and can be controlled by adjusting the strength of the electric current.
2. Statement 2: They can be turned on and off by controlling the electric current.
One of the key features of electromagnets is their ability to be activated or deactivated by regulating the flow of electric current. This controllability makes them versatile and widely used in various applications.
3. Statement 3: They are widely used in MRI machines and magnetic separation equipment.
Electromagnets find extensive usage in different fields such as medical imaging (MRI machines) and industrial processes (magnetic separation equipment). In MRI machines, powerful electromagnets produce the magnetic fields necessary for imaging, while in magnetic separation equipment, electromagnets are used to separate magnetic materials from non-magnetic substances.
Therefore, all three statements provided are correct. Electromagnets play a vital role in modern technology and have diverse applications due to their controllability and ability to produce magnetic fields efficiently.
1. Statement 1: They are the devices that produce a magnetic field when an electric current flows through a coil of wire.
Electromagnets function based on the principle of electromagnetism, where the magnetic field is generated when an electric current passes through a coil of wire. This magnetic field is temporary and can be controlled by adjusting the strength of the electric current.
2. Statement 2: They can be turned on and off by controlling the electric current.
One of the key features of electromagnets is their ability to be activated or deactivated by regulating the flow of electric current. This controllability makes them versatile and widely used in various applications.
3. Statement 3: They are widely used in MRI machines and magnetic separation equipment.
Electromagnets find extensive usage in different fields such as medical imaging (MRI machines) and industrial processes (magnetic separation equipment). In MRI machines, powerful electromagnets produce the magnetic fields necessary for imaging, while in magnetic separation equipment, electromagnets are used to separate magnetic materials from non-magnetic substances.
Therefore, all three statements provided are correct. Electromagnets play a vital role in modern technology and have diverse applications due to their controllability and ability to produce magnetic fields efficiently.
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With reference to the electromagnets, consider the following statements:1. They are the devices that produce a magnetic field when an electric current flows through a coil of wire.2. They can be turned on and off by controlling the electric current.3. They are widely used in MRI machines and magnetic separation equipment.How many of the statements given above are correct?a)Only oneb)Only twoc)All threed)NoneCorrect answer is option 'C'. Can you explain this answer?
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