Foundation
Physics Foundation
Magnetism
Question
(a) What is a solenoid? Draw a sketch of the pattern of field lines of the magnetic field through and around a current carrying solenoid.
(b) Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right hand rule to find out the direction of the magnetic field inside and outside the loop.
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Solution
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(a) A solenoid is a long coil (shaped like a cylinder) containing a large number of close turns of insulated copper wire around an iron core. 
Field lines of the magnetic field through and around a current carrying solenoid is shown in.
(b) Direction of magnetic field inside and outside the loop is given as follows.
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