Understanding the concept of a magnetic field

Question 1

1-

Answer 1

Magnetic field lines always start from the north and ends in the south

Question 2

2-

Answer 2

Smooth curves

Question 3

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Answer 3

Closer lines means stronger fields

Question 4

4-

Answer 4

Magnetic fields are either produced by current carrying conductors or by permanent magnets

Question 5

5-

Answer 5

A force might act on a current carrying conductor placed in a magnetic field