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.

Answer 1

(a) A solenoid is a long coil that contains a large number of close turns of insulated copper wire. The magnetic field pattern produced by a current-carrying solenoid is similar to the magnetic field produced by a bar magnet.



(b)



We can apply the right-hand thumb rule to determine the direction of magnetic field lines around a current caring circular wire.

Here, the current is flowing into the clockwise direction, hence the direction of magnetic field lines inside the loop is going inward the table and the direction of the magnetic field outside the loop is coming out of the table. As shown in the above figure.