1. Magnetic line of force is a _______ continuous curve in a magnetic field.   open   closed   2. During magnetic induction, the end of an unmagnetized magnetic substance nearer to the pole of the inducing magnet acquires _______.   similar polarity   no magnetism   opposite polarity   Hint Half-n-half Clue   3. 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   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. Magnetic materials have millions of regions called _______, each of which acts as a tiny magnet.   fields   domains   lines   Half-n-half Clue   7. Magnetic lines of force intersect each other at right angles.   True   False