Verified Solution • 2025–26 Session moderate

QJEEM19Ph7f53: JEE Main 2019 Physics - Class 12 JEEM19Ph7f53 Solution: Two coils 'P' and 'Q' are separated by some distance. When a…

Two coils 'P' and 'Q' are separated by some distance. When a current of 3 A flows through coil 'P', a magnetic flux of 10–3 Wb passes through 'Q'. No current is passed through 'Q'. When no current passes through 'P' and a current of 2 A passes through 'Q', the flux through 'P' is :-

Multiple Choice Options

  • A 3.67 × 10–4 Wb
  • B 3.67 × 10–3 Wb
  • C 6.67 × 10–4 Wb
  • D 6.67 × 10–3 Wb

Step-by-Step Verified Solution

Mutual induction

ϕq=MIp{\phi _q} = M{I_p}

10–3 = M(3)

⇒M=13×10−3\Rightarrow M = {1 \over 3} \times {10^{ - 3}}

ϕp=MIq{\phi _p} = M{I_q}

⇒ϕp=6.67×10−4Wb\Rightarrow {\phi _p} = 6.67{\rm{ }} \times {\rm{ }}{10^{-4}}{\rm{ }}Wb

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