A place where dip = 90°, `B_H = O. Can a magnetic needle align in the N-S direction at this place?

A place where dip = 90°, B_H = O br What is the value of B at this place?

When a magnetic needle is suspended by a string it comes to rest in the North-South direction. This shows that earth behaves as a magnet. Define dip at a place.

A bar magnet free to rotate In a vertical plane aligns itself with Its axis vertical at a certain places on earth.What are the values of dip andhorizontal component'of earth’s magnetic field at the place?