Magnetic field and force 好難,高手賜教

我本書寫:
A magnetic field is the space in which objects experience a magnetic force.

By Fleming's left hand rule, the thumb gives the direct of the magetic force, the first finger is the directiion as the exrernal magnetic field B, the second finger in the same direction as the current l.

很清楚, 拇指是force。
但magnetic field又是force? Current會produce a magnetic force around itself, 又有magnetic, 那是不是又有force around the current?