back emf

[pine maple]

are we supposed to ignore the back emf produced by solenoid

[tropic crane]

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Note for OP

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[sour cove]

read question bro it says assume inductance to be negligible

[pine maple]

current as function of time likhe mein toh inductance lagega par

[near heart]

but it is given na that ignore it so

[pine maple]

inductance ko ingore kar dia toh emf hi nhi aayega

[near heart]

inductance of ring hai

[pine maple]

ring ki inductance se i as func of time nahi ayega

[near heart]

Mai isko subah revisit karti hu

[peak bear]

Yeah..i think the q says that you've to ignore the self inductance of the ring, created due to the current that'll be induced in it

only consider the flux through the ring because of the solenoid

[pine maple]

why not the flux which causes back emf in the solenoid

[peak bear]

the -Ldi/dt term? i dont think you can ignore that... like to get the current through the solenoid you have to ignore the ring ka L... then you get an lr circuit - solenoid ka L and ring ka r. then you can find out the flyx thru the ring.. here we ignore the self inductance of the ring.

[pine maple]

+solved @peak bear