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प्रश्न
What conclusion is drawn regarding the magnetic field at a point if a compass needle at that point rests in any direction? Give reason for your answer.
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उत्तर
If a compass needle rests in any direction (i.e., it does not align consistently in one direction), then the magnetic field at that point is zero or very weak.
A compass needle aligns itself along the direction of the net magnetic field present at a point (typically Earth's magnetic field). If no magnetic field is present, or if two or more magnetic fields cancel each other out, the needle has no preferred direction and may rest in any random position.
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संबंधित प्रश्न
A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be:
(a) only in horizontal plane around the magnet
(b) only in vertical plane around the magnet
(c) in horizontal as well as in vertical planes around the magnet
(d) in all the planes around the magnet
The magnetic field lines:
(a) intersect at right angles to one another
(b) interest at an angle 45° to each another
(c) do not cross one another
(d) cross at an angle of 60° to one anotherv
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(a) in wire A?
(b) in wire B?
Name the rule which you have used to get the answer.
What is an artificial magnet? State two reasons why do we need artificial magnets .
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In following figure, draw at least two magnetic field lines between the two magnets.
(a) 
Write a note on the 'magnetic field'.
Select the correct option:
Nickel is a:
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