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How does an electromagnet differ from a permanent magnet?

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Important Questions on Magnetism and Electromagnetism

HARD
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Which of the following factors affects the magnetic field of an electromagnet?
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Where is an electromagnet in a speaker?
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

Name the technique by which doctors can produce pictures showing insides of the human body.

(Choose from Magnetic Resonance Imaging, Magnified Resonance Imaging, Magnetic Recorded Imaging)

HARD
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
In which of the following applications are electromagnets used for medical purposes?
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
How do electromagnets help a speaker to vibrate?
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
What is the use of Electromagnet in Speakers?
HARD
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
How does the core material affect the strength of an electromagnet?
MEDIUM
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Magnetic field produced is most significant in which of the following two organs of human body?
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

Is a speaker an electromagnetic device?

EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
What is the full form of MRI? 
(Choose from Magnetic Resonance Imaging, Magnified Resonance Imaging, Magnetic Recorded Imaging)
HARD
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
How can the strength of an electromagnet be increased?
HARD
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
What is the advantage of using an electromagnet over a permanent magnet in industrial applications?
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Name two human body organs where magnetism produced is significant.
MEDIUM
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
What is the role of the electric current in an electromagnet?
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Name one technique which can detect cancerous tissue inside the body of a person. (Write the solution in full form).
(Choose from: Magnetic Resonance Imaging/ Moving Resonance Imaging)
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Which type of magnet is used in speakers?
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Write as many uses of a magnet as you can.
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
The magnetic field used in MRI is about ____________ times stronger than that of the earth's magnetic field.
EASY
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Name one medical technique which is based on magnetism produced in human body. For what purpose is this technique used?
HARD
Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets
Which of the following is an example of an application of an electromagnet?