| ASSERTION: To measure the magnetic moment of a bar magnet, we may use a tangent galvanometer. |
| REASON: We must know the horizontal component of earth's field to measure the magnetic moment of a bar magnet. |
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: D
Solution :
If horizontal Component of earth's magnetic (H) field is known, a deflection magnetometer can be used for measuring magnetic movement. If H is now known, then to measure M we have to use both the deflection and oscillation magnetometer.
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