| ASSERTION: There is only one neutral point on a horizontal board when a magnet is held vertically on the board. |
| REASON: At the neutral point the net magnetic field due to the magnet and magnetic field of the earth is zero. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
There will be only one neutral point on the horizontal board. This is because field of earth magnetic field is from south to north; and the field of pole on the board is radially outwards. At any point towards south of magnetic pole, field of earth and field of pole will cannot cencel out to give a neutral point.
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