1. The arrow on a magnetic line of force is determined by the direction in which a free _______ pole would point in a magnetic field.   north   south   2. Magnetic lines of force travel from _______ outside the magnet.   south to north   north to south   3. The earth has been found to behave like a huge magnet.   True   False   4. Magnetic lines of force intersect each other at right angles.   True   False   5. During magnetic induction, the end of an unmagnetized magnetic substance nearer to the pole of the inducing magnet acquires _______.   no magnetism   opposite polarity   similar polarity   Hint Half-n-half Clue   6. Magnetic line of force is a _______ continuous curve in a magnetic field.   open   closed   7. Magnetic lines of force attract each other.   True   False