A short bar magnet of magnetic moment 20Am2 has a cross sectional area of 1.5×10-4m2 . If the intensity of magnetisation of the magnet is 105A/m , the length of the magnet is
0.33m
0.13cm
1.33m
1.33cm
Formula : Intensity of magnetization I=MV
⇒I=MALGiven : M=20Am2A=1.5×10-4m2l=105A/m∴I=MAl=201.5×10-4×105=43=1.33 m