Question

the equality resistance between A and B​

Answer 1

Answer:

$\huge\cal{\fcolorbox{blue}{blue}{ANSWER}}$

ᴛʜᴇ ᴇqᴜɪᴠᴀʟᴇɴᴛ ᴄɪʀᴄᴜɪᴛ ɪꜱ ꜱʜᴏᴡɴ ɪɴ ꜰɪɢᴜʀᴇ.

ʜᴇʀᴇ, ʀᴇq1=ʀ+ʀ=2ʀ,ʀᴇq2=ʀ∣∣2ʀ=ʀ+2ʀʀ×2ʀ=2ʀ/3 ᴀɴᴅ

ʀᴇq3=ʀ+2ʀ/3=5ʀ/3

ᴛʜᴜꜱ, ʀᴀʙ=ʀ∣∣5ʀ/3=ʀ+5ʀ/3ʀ(5ʀ/3)=85ʀ

Answer 2

Explanation:

answer is 60ohms

(1/10+1/20) + 40 + (1/20+1/40)

= 60 ohms