The strength of the magnetic field between the poles of an electromagn

1.	The strength of the magnetic field between the poles of an electromagnet would be unchanged if : (a) current in the electromagnet winding were doubled (b) direction of current in electromagnet winding were reversed (c) distance between the poles of electromagnet were doubled (d) material of the core of electromagnet were changed
Answer» The strength of the magnetic field between the poles of an electromagnet would be unchanged if : (a) current in the electromagnet winding were doubled (b) direction of current in electromagnet winding were reversed (c) distance between the poles of electromagnet were doubled (d) material of the core of electromagnet were changed

The strength of the magnetic field between the poles of an electromagnet would be unchanged if : (a) current in the electromagnet winding were doubled (b) direction of current in electromagnet winding were reversed (c) distance between the poles of electromagnet were doubled (d) material of the core of electromagnet were changed

Answer»

The strength of the magnetic field between the poles of an electromagnet would be unchanged if :

(a) current in the electromagnet winding were doubled

(b) direction of current in electromagnet winding were reversed

(d) material of the core of electromagnet were changed