QJEEM13Ph9a88: JEE Main 2013 Physics - Class 12 JEEM13Ph9a88 Solution: A circular loop of radius lies center of the small loop is on…

Question

Verified Solution • 2025–26 Session moderate

A circular loop of radius

0.3

cm

lies center of the small loop is on the axis of the bigger loop. The distance between their centers is

15

cm.

If a current of

2.0

A

flows through the smaller loop, than the flux linked with bigger loop is

Accepted Answer

As we know, Magnetic flux,

\phi = B.A

{{{\mu _0}\left( 2 \right){{\left( {20 \times {{10}^{ - 2}}} \right)}^2}} \over {2\left[ {{{\left( {0.2} \right)}^2} + {{\left( {0.15} \right)}^2}} \right]}} \times \pi {\left( {0.3 \times {{10}^{ - 2}}} \right)^2}

On solving

= 9.216 \times {10^{ - 11}} = 9.2 \times {10^{ - 11}}\,\,

weber

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