Question

three resistors of 5,10,15 ohm are connected first in series and then in parallel.find the ratio of net.resistance in both case?​

Answer 1

Answer:

I will tell it to you Tomorrow

Answer 2

R1, R2, R3 are in parallel  

$1/{R_T}=1/{R_1}+1/{R_2}+1/{R_3}$  

$1/R_T=1/5+1/10+1/15\\\\=6/30+3/30+2/30\\\\=11/30$

SERIES

R = R1 + R2 + R3 = 30Ω

I = V/R = 30 / 30 = 1A

V across 10Ω = IR2 = 1 × 10 = 10 V