NCERT Exemplar I — task. Science CBSE, Class 10.

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1. Choose the incorrect statement from the following regarding magnetic lines of field

Relative strength of magnetic field is shown by the degree of closeness of the field lines
The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points
If magnetic field lines are parallel and equidistant, they represent zero field strength
Magnetic field lines are closed curves

2. If the key in the arrangement (See the figure) is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are

elliptical in shape
concentric circles near the point O but of elliptical shapes as we go away from it
concentric circles
straight lines parallel to each other

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37. NCERT Exemplar I

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