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Standard XII
Physics
NCERT
Question

Magnetic field lines of earth at a point are not
  1. Parallel
  2. of variable magnitude
  3. Directed from geographical South to geographical North
  4. Equidistant

A
Parallel
B
Directed from geographical South to geographical North
C
of variable magnitude
D
Equidistant
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Solution
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Magnetic field lines of earth on surface are uniform i.e. parallel and equidistant and are directed from geographical south to geographical north.

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