Foundation
Physics Foundation
Magnetism
Question
What is a solenoid? Draw the pattern of magnetic field lines of
(i) A current-carrying solenoid and
(ii) A bar magnet.
(i) A current-carrying solenoid and
(ii) A bar magnet.
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Solution
A solenoid is a long cylindrical coil containing a large number of closely spaced turns of insulated copper wire.
Distinguish between the two field are-
(a) The strength of the magnetic field due to a solenoid can be changed while the magnetic field strength due to bar magnet cannot be changed.
(b) Solenoid produces magnetic field so long as current flows in its coils while bar magnet produces a permanent magnetic field.
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