magnetic fields by a solenoid...
Asked by | 4th Jan, 2010, 05:02: AM
The solenoid is a long coil containing a large number of close turns of insulated copper wire. The magnetic field produced by a current carrying solenoid is similar to themagnetic field produced by a bar magnet. The lines of magnetic force pass through the solenoid and return to the other end. If a current carrying solenoid is suspended freely, it comes to rest pointing North and South like a suspended magnetic needle. One end of the solenoid acts like a N-pole and the other end a S-pole. Since the current in each circular turn of the solenoidflows in the same direction, the magnetic field produced by each turn of the solenoid adds up, giving a strong resultant magnetic field inside the solenoid. A solenoid is used for making electromagnets.
The strength of magnetic field produced by a current carrying solenoid is:
- Directly proportional to the number of turns in the solenoid
- Directly proportional to the strength of current in the solenoid
- Dependent on the nature of "core material" used in making the solenoid. The use of soft iron rod as core in a solenoid produces the strongest magnetism.
Hope this helps.
Answered by | 4th Jan, 2010, 10:30: AM
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