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Magnetic Effect of Current — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsMagnetic Effect of Current1 Mark
MCQ
A circular coil $'A\ ’$ has a radius $R$ and the current flowing through it is $I.$ Another circular coil $'B\ ’$ has a radius $2R$ and if $2I$ is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of (i.e. $B _{ A }$ to $B _{ B }$ )
  • A
    $4 : 1$
  • B
    $2 : 1$
  • C
    $3 : 1$
  • ✓
    $1 : 1$
✓

Answer

Correct option: D.
$1 : 1$
$1 : 1$

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