What is an electromagnet?

Important Questions on Magnetism and Electromagnetism

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

What is the primary use of electromagnets in electric motors?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

In which of the following applications are electromagnets used for medical purposes?

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?

MEDIUM

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

How does the number of coils affect the strength of an electromagnet?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

Which of the following factors affects the magnetic field of an electromagnet?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

What happens to the strength of an electromagnet if the voltage is increased?

MEDIUM

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

Which of the following materials is commonly used as the core of an electromagnet?

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.

MEDIUM

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

What type of current is used to create an electromagnet?

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?

MEDIUM

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

What is the relationship between the current and the strength of an electromagnet?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

What is the function of an electromagnet in a junkyard crane?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

Which of the following applications uses electromagnets to separate materials?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

Which of the following devices uses electromagnets to generate a magnetic field?

MEDIUM

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

What would happen if the current through an electromagnet is turned off?

MEDIUM

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

How does an electromagnet differ from a permanent magnet?

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?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

What is the primary function of an electromagnet in a relay?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

How does the core material affect the strength of an electromagnet?

HARD

Science>Physics>Magnetism and Electromagnetism>Electro Magnets and Applications of Electromagnets

How can the strength of an electromagnet be increased?