Four identical long solenoids A, B, C and D are connected to each other as shown in the figure. If the magnetic field at the center of A is 3T, the field at the center of C would be : (Assume that the magnetic field is confined with in the volume of respective solenoid).

Engineering

Physics

Magnet and Magnetic Dipole Moment

Question

12T

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$ϕ$ $\propto$ i

⇒ B $\propto$ i

$so, field at centre of C = \frac{3}{3} - IT$

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