Using a bar magnet `P`, a vibration magnetometer has time period 2 sec. When a bar Q (identical to P in mass and size) is placed on top of P, the time period is unchanged. Which of the following statements is true?
A
Q is of non-magnetic material
B
Q is a bar magnet identical to P , and its north pole placed on top of P 's north pole
C
Q is of unmagnetized ferromagnetic material
D
Nothing can be said about Q 's properties
Text Solution
Verified by Experts
The correct Answer is:
B
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