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  • A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in Figure 13.5. The direction of magnetic field at a point will be North to South (a) directly above the wire (b) directly below the wire (c) at a point loc

A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in Figure 13.5. The direction of magnetic field at a point will be North to South
(a) directly above the wire
(b) directly below the wire
(c) at a point located in the plane of the paper, on the north side of the wire
(d) at a point located in the plane of the paper, on the south side of the wire
 

Answers (1)

Answer: B
Solution:
We can use right hand thumb rule to find out magnetic field due to a current carrying wire.
The magnetic field will be forming close loop and if we see it from East the loop will be clockwise.
At a point above the wire, the direction of magnetic field will be towards North from south and at a point below the wire, the magnetic field will be towards south from North.
At a point located towards north, the magnetic field will be into the paper. At a point located towards south the magnetic field will be out of the paperHence the correct option is option B

 

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