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प्रश्न
What is \[M_{21}\] for two coaxial solenoids with the smaller solenoid inside the larger?
विकल्प
\[M_{21}=\mu_0n_1n_2\pi r_1^2l\]
\[M_{21}=\mu_0n_1n_2\pi r_2^2l\]
\[M_{21}=\mu_0n_1n_2\pi r_2^2lI_1\]
\[M_{21}=\frac{\mu_0n_1n_2\pi r_2^2}{l}\]
MCQ
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उत्तर
Divide the secondary’s total flux linkage by the primary current \[I_1\] . The resulting mutual inductance is \[M_{21}=\mu_0n_1n_2\pi r_2^2l\] .
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