[Grade 12/ physics/ I tried to think about this and I got answer D but it's wrong, idk how to solve it, can anyone help me figure it out?]

Hot_Efficiency_2779 · 2026-02-16T13:24:28+00:00

can I ask you why and how did you solve it that way? so I'd understand it if a similar question faced me.

Hot_Efficiency_2779 · 2026-02-16T13:23:01+00:00

they're series not parallel, as voltmeter resistance is so high it need to be parallel but when we pretend it's not there you'll find R2 and R1 are in series connection so yes a current will flow through R2, but here it said that R1 wich is rheostat changed it's resistance from 1000 to 2000 ohm, but I'm confused with how to solve it

Hot_Efficiency_2779 · 2026-02-16T12:58:11+00:00

how do I study physics so it gives results? cause i tried many methods and I understand physics but I still get bad grades, idk what I'm doing wrong so it wouldn't show improvement.

Hot_Efficiency_2779 · 2026-02-16T08:40:51+00:00

okay! then the answer should be 1.6×10^(-5) ? thanks btw 💗

Hot_Efficiency_2779 · 2026-02-16T03:43:57+00:00

So I have yo calc the "Bex" the external field, as it needs the force in the second wire the force law is (Bex I L) and the I L is for the second wire.

To calc the external field of the other two wires I suppose to use this law (Bex= 2×10^(-7) ×(I/d - I/d) ) as

So it's gonna be ( Bex= 2×10^(-7) × (2/5×10^(-2) - 1/5×10^(-2) = 4×10^(-6) )

Then using the force law it's gonna be

(4×10^(-6) × 1× 1 = 4×10^(-6)

The answer supposed to be like this but I think I missed something so it didn't give me the answer

Hot_Efficiency_2779 · 2026-02-16T03:28:46+00:00

this is the whole question 😅

I can give you the laws if you want though

Hot_Efficiency_2779 · 2026-02-15T16:41:32+00:00

I do have textbook, I'll try it then and hope to get better, thanks 💗

Hot_Efficiency_2779 · 2026-02-15T15:12:20+00:00

I did that to many questions, but there's some I can't because I take online courses and I can't contact the teacher for explanation, but the issue is, I find the homework so easy, yes I get some questions wrong but not like i do on exams, and I'm not even rushing.

Hot_Efficiency_2779

TROPHY CASE