CBSE Class 10 Science 2019 · Paper 31/4/1 · Question 4
Draw magnetic field lines around a bar magnet.
Answer
Closed field lines leave the north pole and enter the south pole outside the magnet, crowded near the poles and never crossing.
Draw a bar magnet with its poles labelled N and S and closed field lines around it: the lines come out of the north pole, curve round the magnet and go into the south pole, with arrows from N to S outside the magnet (inside the magnet they run from S to N, so each line is a closed loop). The lines are crowded near the poles, where the field is strongest, spread out farther away, and no two lines cross each other.
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