The figure shows the various positions (labelled by subscripts) of small magnetized needles P and Q. The arrows show the direction of their magnetic moment. Which configuration corresponds to the lowest potential energy of all the configurations shown?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
As potential energy is given as
[when 
minimum]
Hence, M and B should be parallel to each other for minimum potential energy.
Here, 
configuration provides the condition of lowest PE.
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