Does earth's magnetic field also change from time to time? If yes on what times scale does it change appreciably?

Answer the following questions: The earth’s magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably?

what time does a crop take to mature?

The resistivtiy does not change if

Horizontal component of earth's magnetic field at a place is sqrt3 times the vertical component. What is the value of angle of dip at this place?

A bar magnet is oscillating in the earth's magnetic field with a time period T. If the mass is quadrupled, then its time period will be:

The vertical component of earth's magnetic field is sqrt3 times the horizontal component. What is the value of dip at this place?

Why earth's magnetic field does not affect the working of the moving coil galvanometer?

The vertical component of the earth's magnetic field at a given place is sqrt3 times its horizontal component. If total intensity of earth's magnetic field at the place is 0.4G, find the vale of angle of dip