A long solenoid of diameter $$0.1$$ m has $$2$$ x $$104$$ turns per meter. At the centre of the solenoid, a coil of $$100$$ turns and radius $$0.0$$ I m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to OA from $$4A$$ in $$0.05$$ s. If the resistance of the coil is $$10$$$$π$$$$2$$Ω. The total charge flowing through the coil during this time is :

Question

Infinity Learn · Accepted Answer

$$q=$$∆ϕ∆$$t.1R$$∆t $$q=$$μ$$0nN$$$$π$$$$r2$$∆i∆$$t1R$$∆t $$q=4$$π x $$10-7$$ x $$2$$ x $$104$$ x $$100$$ x π x $$(10-2)2$$ x $$40.05110$$$$π$$$$2$$ x $$0.05$$ $$q=32$$μC

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