A long solenoid of radius $$2$$ cm has $$100$$ $$turns/cm$$ and is surrounded by a $$100$$ turn coil of radius $$4$$ cm having a total resistance $$20$$Ω. If current changes from $$5A$$ to $$-5A$$, find the charge through galvanometer.

Question

A long solenoid of radius $$2$$ cm has $$100$$ $$turns/cm$$ and is surrounded by a $$100$$ turn coil of radius $$4$$ cm having a total resistance $$20$$Ω. If current changes from $$5A$$ to $$-5A$$, find the charge through galvanometer.

Infinity Learn · Accepted Answer

ϕ$$=B$$$$π$$$$r2$$ϵ$$=d$$ϕ$$dt=N$$$$π$$$$r2dBdt$$             $$=N$$$$π$$$$r2$$μ$$0ndidtI=$$ϵR and ∆$$Q=I$$∆$$t=N$$$$π$$$$r2$$μ$$0nR$$∆t∆$$Q=100$$×π×$$(2$$×$$10-2)2$$×$$104$$×$$4$$π×$$10-7$$×$$1020$$       $$=8$$×$$10-4c=800$$ μC

A long solenoid of radius $2 cm$ has $100 turns/cm$ and is surrounded by a $100$ turn coil of radius $4 cm$ having a total resistance $20 Ω$ . If current changes from $5 A$ to $- 5 A$ , find the charge through galvanometer.

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A long solenoid of radius 2 cm has 100 turns/cm and is surrounded by a 100 turn coil of radius 4 cm having a total resistance 20Ω. If current changes from 5A to -5A, find the charge through galvanometer.

Unlock the full solution & master the concept.

Ready to Test Your Skills?

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A long solenoid of radius $2 cm$ has $100 turns/cm$ and is surrounded by a $100$ turn coil of radius $4 cm$ having a total resistance $20 Ω$ . If current changes from $5 A$ to $- 5 A$ , find the charge through galvanometer.