Question

Identify which of the following
property is not related to the solenoid
coil?
1 The properties of the magnetic
field created by solenoid are not the
same as the magnetic field of a bar
magnet
2 Solenoid having north and south
poles.
3 Magnetic field in solenoid is
uniform
4 A series of copper coils with an
electric insulation coating around the
object forms a solenoid.
​

Answer 1

Answer:

3 . Magnetic field created by solenoid is not unifrom.

only inside the coil , magnetic field is uniform .

Answer 2

1. The poles of the bar magnet are fixed whereas for a solenoid the poles can be altered. The strength of the magnetic field of a bar magnet is fixed ie, unaltered whereas the strength of the magnetic field of a solenoid depends on the electric current that is passed through it
2. Magnetic field lines are produced around the solenoid when a current is passed through it. ... It means the end of solenoid which is connected to the negative terminal of the battery behaves as north pole as like poles repel each other similarly the other and behaves as a south pole.
3. Since we can arbitrarily change the dimensions of the loop and get the same result, the only physical explanation is that the integrands are actually equal, that is, the magnetic field inside the solenoid is radially uniform.
4. For making the coils we use insulated copper wire because insulated wires acts like a different wires, i.e. no of turns will be more and magnetic field will be stronger. But when wire is not insulated, all turns will act like a one single copper wire and magnetic field produced will be less