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प्रश्न
Define the Isogonic line.
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उत्तर
A line that joins all the places on earth, having the same angle of declination is called an isogonic line.
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संबंधित प्रश्न
A thick wire is hanging form a wooden table. An anticlockwise magnetic field is to be produced around the wire by passing current through this wire by using a battery. Which terminal of the battery should be connected to the:
(a) top end of wire?
(b) bottom end of wire?
Give reason for your choice.
A magnetic field exerts no force on:
an electrical charge moving perpendicular to its direction
an unmagnetised iron bar
a stationary electric charge
a magnet
Explain what you understand by magnetic induction. What role does it play in attraction of a piece of iron by a magnet?
Figure. shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south direction. There are no other magnets or magnetic materials nearby.
Indicate by crosses, the likely positions of the neutral points.
Write a note on the 'magnetic field'.
Magnetic lines of force never ______ each other.
The direction of the magnetic lines around a current-carrying conductor can be easily understood using the ______ rule.
A closely wounded circular coil of radius 5 cm produces a magnetic field of 37.68 × 10-4 T at its center. The current through the coil is ______ A. [Given, number of turns in the coil is 100 and π = 3.14)
