What is a solenoid? Draw magnetic field lines due to a current carrying solenoid. Write three important features of the magnetic field obtained.
Answers
A solenoid is a coil of a large number of circular turns of wire wrapped in the shape of a cylinder. On passing electric current, a magnetic field is developed along the axis of solenoid. Magnetic field lines are drawn above.
In above image:-
1). The magnetic field for the current carrying solenoid
2). For bar magnet.
List of the distinguishing features between the two fields:
a) The poles of the bar magnet do not lie exactly at the end of the magnet but are somewhat inside. In a solenoid, poles can be considered to be lying at the edge.
b) The magnetism retains in the bar magnet naturally but in the solenoid, the magnetism is there so long current flows through it.
c) A magnetic field of a bar magnet emanates from throughout the body of the magnet, with more intensity at the poles. While there is no field emanating from the lateral surface of the solenoid.
Answer:
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