Lines which represent places of constant angle of dip are called
Isobaric lines
Isogonic lines
Isoclinic lines
all of the above
Define geographic meridian. and Define magnetic meridian.
Assertion : In high latitudes one sees colourful curtains of light hanging down from high altitudes
Reason : The high energy charged particles from the sun are deflected to polar regions by the magnetic field of the earth.
A very small magnet is placed in the magnetic meridian with its south pole pointing north. The null point is obtained $20\, cm $ away from the centre of the magnet. If the earth's magnetic field (horizontal component) at this point be $0.3$ $gauss$, the magnetic moment of the magnet is
What was the recognition of Earth’s magnetic field ? State dynamo effect
Due to the earth's magnetic field, charged cosmic ray particles