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प्रश्न
A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anti clockwise and clockwise respectively. The magnetic field lines point from B to A. The N-pole of the resultant magnet is on the face close to
विकल्प
A
B
A if the current is small, and B if the current is large
B if the current is small and A if the current is large
उत्तर
A
Explanation -
When we see from point A, the direction of the current will be anticlockwise and when we see the direction of current from point B then it will be clockwise. It means current is flowing as shown in the figure given below.
By right-hand thumb rule, the magnetic field lines will be in the direction from point B to A.
We also know that the magnetic field lines emerge from the North Pole and merge at the South Pole outside the magnet.
Hence, in this circuit face, A represents North pole and face B represents south pole.
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संबंधित प्रश्न
Fill in the following blank with suitable words:
Magnetic field lines leave the .......... pole of a bar magnet and enter at its .......... pole.
Draw a diagram to show the magnetic field lines around a bar magnet.
The magnetic field lines produced by a bar magnet:
(a) originate from the south pole and end at its north pole
(b) originate from the north pole and end at its east pole
(c) originate from the north pole and end at its south pole
(d) originate from the south pole and end at its west pole
What do you understand by the term magnetic field lines?
Sketch four magnetic field lines as obtained in a limited space on a horizontal plane in the earth's magnetic field alone.
Complete the following sentence :
If the field lines in a magnetic field are parallel and equidistant, the magnetic field is __________ .
The intensity of a magnetic field is indicated by the lines of ______.
Draw diagram showing the arrangement of the lines of force for a single magnet.
Inside the magnet, the field lines moves ____________.
Assertion (A): Magnetic field lines never intersect each other.
Reason (R): If they intersect, then at the point of intersection, the compass needle would point towards two directions, which is not possible.
