Question

a soft iron bar is enclosed by a coil of insulated copper wire as shown in figure when the plug key is closed , the face B of the iron bar marked as - option
a. N- pole
b. S- pole
c. N - pole if current is large
d. S - pole if current is small ​

Answer 1

Answer:

NORTH POLE

N-pole

Explanation:

thanks for brainliest

Answer 2

Answer:

Option A  N- pole is the proper answer in the provided options.

Explanation:

A solenoid exists as a device that comprises a coil of a conducting material like copper and a movable armature. When an electric current exists supplied to the solenoid, it creates a magnetic field around the coil and the armature is moved. In this way, the solenoid transforms electrical energy into mechanical energy.

The specialty of soft iron exists in that it is a highly ferromagnetic material that allows maximum field lines to pass through it. When current exists supplied to solenoid, it creates a magnetic field inside and outside of it. The solenoid magnetizes the iron bar and the field strengthens, thus creating a polarity on the sides of the solenoid, depending on the direction of the current.

Hence, option A  N- pole is the proper answer in the provided options.

The solenoid  is shown below,

SPJ2