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Standard X
Physics
Question

In case of a bar magnet, lines of magnetic induction


  1. start from the north pole and end at the south pole
  2. run continuously through the bar magnet and outside
  3. emerge in circular paths from the middle of the bar
  4. are produced only at the north pole like rays of light from a bulb

A
start from the north pole and end at the south pole
B
run continuously through the bar magnet and outside
C
are produced only at the north pole like rays of light from a bulb
D
emerge in circular paths from the middle of the bar
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Solution
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Magnetic lines of force in a bar magnet are continuous forming closed loops as shown in the figure.
Outside the magnet, the lines run from north pole to south pole whereas oppositely inside.

582199_13440_ans_7f117722086c4deca59462cb264bcf7c.png

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Similar Questions
Q1

The magnetic field lines produced by a bar magnet :

(a) originate from the south pole and end at its north pole

(b) originate from the north pole and end at its each pole

(c) originate from the north pole and end at its south pole

(d) originate from the south pole and end at its west pole

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Q2

If the above bar magnet is broken along the middle line then how many north poles and south poles will we get in the end?


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Q3
A bar magnet is placed north-south with its north pole due north. The points of zero magnetic field will be in which direction from centre of magnet
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Q4
Assertion :Magnetic field strength at a point on axial line of a bar magnet is along south to north pole of magnet. Reason: The magnetic field strength can never be along north to south pole of a magnet.
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Q5
State whether true or false :
Outside the magnet, the magnetic lines of forces pass from north pole to the south pole and inside the magnet, they pass from south to the north pole.

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