Question
Question: A short bar magnet has a magnetic moment of 0.65 J T-1. then the magnitude and direction of the magn...
A short bar magnet has a magnetic moment of 0.65 J T-1. then the magnitude and direction of the magnetic field produced by the magnet at a distance 8 cm from the centre of magnet on the axis is
A
2.5 × 10-4 T, along NS direction
B
2.5 × 10-4 T, along SN direction
C
4.5 × 10-4 T, along NS direction
D
4.5 × 10-4 T, along SN direction
Answer
2.5 × 10-4 T, along SN direction
Explanation
Solution
Here 
The field produced by magnet at axial point is given by
along SN.