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

Concentric circles

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No magnetic field

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Straight lines parallel to each other

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Concentric circles near the point O but of elliptical shapes as we go away from i

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Solution

The correct option is B
No magnetic field

We get a magnetic field patterns around a wire if it is carrying current. So, once the key is removed, there will be no current flowing through the circuit and therefore no magnetic field will exist.

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Similar questions

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

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

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

Question 2
If the key in the arrangement (Figure) is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are
(a) concentric circles
(b) elliptical in shape
(c) straight lines parallel to each other
(d) concentric circles near the point O but of elliptical shapes as we go away from it

Question 2
If the key in the arrangement (Figure) is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are
(a) concentric circles
(b) elliptical in shape
(c) straight lines parallel to each other
(d) concentric circles near the point O but of elliptical shapes as we go away from it

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

The correct option is B No magnetic field We get a magnetic field patterns around a wire if it is carrying current. So, once the key is removed, there will be no current flowing through the circuit and therefore no magnetic field will exist.

The correct option is B
No magnetic field

We get a magnetic field patterns around a wire if it is carrying current. So, once the key is removed, there will be no current flowing through the circuit and therefore no magnetic field will exist.