MEDIUM
10th CBSE
IMPORTANT
Earn 100

What is the purpose of the soft iron core used in making 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 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? 
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 12
State the rule for the direction of magnetic field produced around a current carrying conductor. Draw a sketch of pattern of field lines due to the current flowing through a straight conductor. 
MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 12
What is a solenoid? Draw a sketch of the pattern of field lines of magnetic field inside and outside the loop.
MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4A>Q 12
Consider a circular loop of wire. Let the current pass through the loop clockwise. Apply the right hand rule to find the direction of magnetic field inside and outside the loop.