Abstract:
Cellular telephone (Hand phone - HP) today has been trendy communication gadget which is small and can be brought by users so that almost everybody posses the hand phone. However, the users claim that weak static magnetic fields (B) are induced around the HP.
In this research, measurement of static magnetic induction and magnetic moment induced
by three brand HP’s was carried out. These three selected HP’s were named A, B and C. The measurement of static magnetic induction was done for two directions, which were horizontal and vertical directions. The static magnetic induction induced by those HP’s was
measured using a Magnetic Probe. For the horizontal direction (x direction), the magnetic
induction was recorded with the distance of 0,3 cm from the HP’s. The static magnetic induction was also measured in vertical direction (z-direction). The results showed that the
static magnetic induction induced by those HP’s had normal distribution with the position of the peak located near the top of the HP’s. The values of magnetic induction were found to be of 35x10-4 T, 29,6 x 10-4 T and 11,5 x 10-4 T for B, A and C, respectively. For vertical
measurement, it was found that the static magnetic induction reduced its values with
increasing distance from the HP’s. By plotting B versus distance it was found that the magnetic moment of the HP’s was 1,5 Am2, 1 Am2 and 0,5 Am2 for type A, B and C,
respectively
