What is an electromagnet?

Important Questions on Magnetic Effects of Electric Current

MEDIUM

10th CBSE

IMPORTANT

Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 9

List any of two uses of electromagnet.

MEDIUM

10th CBSE

IMPORTANT

Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 9

Draw a labelled diagram to show how an electromagnet is made. 

MEDIUM

10th CBSE

IMPORTANT

Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 9

What is the purpose of the soft iron core used in making an electromagnet?

MEDIUM

10th CBSE

IMPORTANT

Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 10

What are "magnetic field lines"? How is the direction of a magnetic field at a point determined?

MEDIUM

10th CBSE

IMPORTANT

Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 10

Draw two field lines around a bar magnet along its length on its two sides and mark the field directions on them by arrow marks.

MEDIUM

10th CBSE

IMPORTANT

Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 10

List any three properties of magnetic field lines.

MEDIUM

10th CBSE

IMPORTANT

Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 11

Why is pure iron not used for making permanent magnets? Name one material used for making permanent magnets. Describe how permanent magnets are made electrically. State two examples of electrical instruments made by using permanent magnets.

MEDIUM

10th CBSE

IMPORTANT

Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 12

What is a magnetic field? How can the direction of magnetic field lines at a place be determined?