Question

Question No. 33
Vie
If we increase the resistance in the following circuit, deflection in magnetic needle will :
Decrease
Remain unchanged
May increase or decrease
Increase
Mark​

Answer 1

Answer:

If the wire is then wound into a coil, the magnetic field is greatly intensified producing a static magnetic field around itself forming the shape of a bar magnet giving a distinct North and South pole.

air cored electromagnetic coil

Air-core Hollow Coil

The magnetic flux developed around the coil being proportional to the amount of current flowing in the coils windings as shown. If additional layers of wire are wound upon the same coil with the same current flowing through them, the static magnetic field strength would be increased.

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