1. It has been found that the earth steadily induces its own magnetic poles into a bar magnet kept in some place for a few weeks.   True   False   2. The phenomenon due to which an unmagnetized magnetic substance behaves like a magnet due to the mere presence of another magnet (which is not actually in physical contact) is called   magnetic field   magnetic lines of force   magnetic induction   Hint Half-n-half Clue   3. Magnetic line of force is a _______ continuous curve in a magnetic field.   closed   open   4. The arrow on a magnetic line of force is determined by the direction in which a free _______ pole would point in a magnetic field.   south   north   5. It is possible to make a bar magnet having a north pole at each end and a south pole in the middle.   True   False   6. If a piece of soft iron is placed in a magnetic field, it will get magnetized by influence or _______.   electrification   force   induction   Half-n-half Clue   7. Magnetic lines of force attract each other.   True   False