iTeachChem•7mo ago

interaction force

why cant i assume the semi-circle as another infinitely long wire and solve

iTeachChem Helper•6/12/25, 5:03 PM

@Gyro Gearloose

iTeachChem Helper•6/12/25, 5:03 PM

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coolguy.•6/12/25, 5:04 PM

Why would you assume that btw

CorrodedCoffinOP•6/12/25, 5:04 PM

Like this

rn_image_picker_lib_temp_b2972c69-29fd-47ae-82a0-30e7d35617bc.jpg

rn_image_picker_lib_temp_6f5fd1e9-9664-4a73-bea6-5c0ef894a390.jpg

Ccoolguy.Why would you assume that btw

CorrodedCoffinOP•6/12/25, 5:04 PM

https://youtu.be/cwKFey3NLV8?si=hK4jmEJFSuh5iu9k

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CorrodedCoffinOP•6/12/25, 5:05 PM

also my sir explained why this is true

coolguy.•6/12/25, 5:05 PM

Then sure you can

coolguy.•6/12/25, 5:05 PM

I've heard of this but have never applied it

Ccoolguy.Then sure you can

CorrodedCoffinOP•6/12/25, 5:05 PM

results dont match

CCorrodedCoffin results dont match

coolguy.•6/12/25, 5:05 PM

Ccoolguy.I've heard of this but have never applied it

CorrodedCoffinOP•6/12/25, 5:05 PM

this is a W results

CorrodedCoffinOP•6/12/25, 5:05 PM

somehow very few people know thi

Sephrina•6/12/25, 5:48 PM

ok i tried on this even though i have no idea but what i think is if we do take the ring and the thread then we can get to there through 2 ways

what force does dl gives on the ring and then integrate to what force the whole thread will give
what force does the thread give on dl of ring and integrate to the whole ring

Sephrina•6/12/25, 5:48 PM

i tried to solve wasnt able to

Sephrina•6/12/25, 5:48 PM

im getting stuck

CorrodedCoffinOP•6/12/25, 6:30 PM

its easy to find force on the ring due to field of wire

CorrodedCoffinOP•6/12/25, 6:31 PM

wouldve shared the working but disc images down

CorrodedCoffinOP•6/12/25, 6:31 PM

anyways

CorrodedCoffinOP•6/12/25, 6:35 PM

in the semicircle , theta angle pe dtheta angle lo
uspe pe bahar k taraf ke force lagega E*dq where E is electric field due to wire = 2klambda/r and dq is charge in element

symmetrically opposite ek aur element hoga so cos component neutralizes and only sin remains
dF = dqEsintheta
integrate from 0 to pi

CCorrodedCoffin its easy to find force on the ring due to field of wire

Sephrina•6/12/25, 7:09 PM

so second one right

CorrodedCoffinOP•6/12/25, 7:17 PM

1st

CorrodedCoffinOP•6/12/25, 7:17 PM

coolguy.•6/13/25, 1:32 AM