Advertisements
Advertisements
Question
How does a magnetic field set up by a solenoid change when cross-sectional area of solenoid is increased?
Advertisements
Solution
By having a solenoid of large diameter or more cross-sectional area, the intensity of magnetic field increases.
RELATED QUESTIONS
How will you make an iron bar electromagnet? Draw a diagram showing the polarities of the electromagnet?
What is an electromagnet?
Name the material of core in (a) an electric bell, (b) electromagnet, (c) a d.c. motor, (d) an a.c. generator and (e) a transformer.
Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
Electric bell ______.
How does a magnetic field set up by a solenoid change when a soft iron core is inserted inside solenoid?
How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?
Why is soft iron generally used as the core of the electromagnet?
State the principle of a D. C. motor.
A current-carrying solenoid is suspended so as to freely rotate in a horizontal plane. State in what direction will it rest. Give a reason for your answer.
or
When a solenoid that is carrying current is freely suspended, it comes to rest in a particular direction. Why does this happen?
Write the answer in your word.
How is an electromagnet made?
