Advertisements
Advertisements
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.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
You are given the magnetic field pattern of a magnet. How will you find out from it where the magnetic field is the strongest?
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
Which of the following statements is incorrect regarding magnetic field lines?
(a) The direction of magnetic field at a point is taken to be the direction in which the north pole a magnetic compass needle points.
(b) Magnetic field lines are closed curves.
(c) If magnetic field lines are parallel and equidistant, they represent zero field strength.
(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines.
Explain why iron filings which are sprinkled on a sheet of cardboard placed over a bar magnet take up a definite pattern when cardboard is slightly tapped.
Answer the following question.
Draw the pattern of magnetic field lines of
(i) a current-carrying solenoid and
(ii) a bar magnet.
List two distinguishing features between the two fields.
The intensity of a magnetic field is indicated by the lines of ______.
The magnetic field lines are stronger near the ______ and it diminishes as you go away from it.
Can two magnetic lines of force intersect? Justify your answer:
