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. Magnetic line of force is a _______ continuous curve in a magnetic field.   closed   open   3. During magnetic induction, the end of an unmagnetized magnetic substance nearer to the pole of the inducing magnet acquires _______.   opposite polarity   no magnetism   similar polarity   Hint Half-n-half Clue   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. Magnetic lines of force intersect each other at right angles.   True   False   6. Magnetic lines of force attract each other.   True   False   7. Magnetic lines of force travel from _______ outside the magnet.   south to north   north to south