Advertisements
Advertisements
Question
State the purpose of the iron core.
Advertisements
Solution
The purpose of the iron core is to intensify the strength of the magnetic field inside the solenoid and thereby increase the strength of the electromagnet.
RELATED QUESTIONS
Tick the most appropriate answer.
Which of the following methods is used to magnetize a magnetic without touching it by a magnet?
State two differences between an electromagnet and a permanent magnet.
principle of an electric motor ?
Complete the following sentence :
On reserving the direction of current in a wire, the magnetic field produced by it gets _____.
State the two properties of the magnetic lines of force around a circular coil.
Why is soft iron generally used as the core of the electromagnet?
State three factors which govern the speed of rotation of an electric motor.
What is dynomo (a.c. generator)? State the principle on which it works.
State the factors, on which depends the magnitude of the force acting on current carrying conductor, when it is kept in a magnetic field perpendicular to it.
How does a magnetic field set up by a solenoid change when cross-sectional area of solenoid is increased?
