A compass needle whose magnetic moment is 
pointing geographical north at a certain place where the horizontal component of earths magnetic field is 
experiences a torque of 
. The declination of the place is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
In stable equilibrium, a compass needle points along magnetic north and experiences no torque. When it is turned through declination 
, it points along geographic north and experiences torque,
or, 
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