Magnetism
A long straight wire carries a current along the Z-axis. One can find two points in the X-Y plane such that :
Sketch four magnetic field lines as obtained in a limited space on a horizontal plane in the earths magnetic field alone.
Four magnetic field lines as obtained in a limited space on a horizontal plane in the earth’s magnetic field alone are as sketched below:
A long straight wire carries a current along the Z-axis. One can find two points in the X-Y plane such that :
Which one of the following is a vector quantity ?
List two methods of producing magnetic fields.
A wire carrying $$I$$ is shaped as shown. Section $$AB$$ is a quarter circle of radius $$r$$. The magnetic field at $$C$$ is directed:
Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it. Describe some salient features of magnetic lines of force concept :
You are provided with two similar bars, one is a magnet and the other is a soft iron bar. How will you distinguish between them without the use of any other magnet or bar? [Hint: A magnet when suspended freely will rest only in north-south direction, but soft iron bar will rest in any direction]
Can two magnetic field lines intersect each other? Give reason to your answer.
In a uniform magnetic field, the field lines are:
Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it. Describe some salient features of magnetic lines of force concept :
What are magnetic field lines? How is the direction of a magnetic field at a point determined? Mention two important properties of magnetic field lines.