Write the cause of Earth magnetism?
Important Questions on Magnetism
The magnetic field lines inside a current carrying long solenoid are in the form of
The cooler part of the sun, emitting weak red light, is called:
Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:
1. The orbit is geosynchronous
2. The orbit is circular
3. The orbit lies in the place of the earth's equator
4. The orbit is at an altitude of 22236 km
Which of the statement(s) given above is/are correct?
Electrically charged particles from space travelling at speeds of several 1000 km/s can severely harm living beings if they reach the surface of the earth. What prevents them from reaching the surface of the earth?
The needle of compass always points towards the _____.
(A) South
(B) North
(C) West
(D) East
