If field lines of a magnetic field are crossed at a point,what does it indicate?

What is a solenoid? Sketch magnetic field lines produced around a current-carrying solenoid. Mark the region where the field is uniform. Compare its field with that of a bar magnet.

$(a)$ What are magnetic field lines? How is the direction of a magnetic field at a point determined?
$(b)$ Draw two field lines around a bar magnet along its length on its two sides and mark the field directions on them by arrow marks.
$(c)$ List any three properties of magnetic field lines.

Draw the patterns of magnetic field lines due to a bar magnet. The magnetic field lines are closed curves. Why?

Define magnetic field. Describe an activity to draw magnetic field lines around a bar magnet from one pole to another pole.

Meena draws magnetic field lines of a field close to the axis of a current-carrying circular loop. As she moves away from the centre of the circular loop,she observes that the lines keep on diverging. How will you explain her observation?