Question

Two conducting wires of same material, equal length and equal diameter are first

connected in series and then in parallel. Compare the equivalent resistance in two cases.​

Answer 1

Answer:

Two conducting wires of the same material and of equal lengths and equal diameter are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be (a) 1:2. (b) 2:1.

Answer 2

Answer:

l1=l2

d1=d2

k1=k2

R= l/ka

SERIES :

R = R1+R2

R = L1/K1A1 + L2/K2A2

R = L/KD^2 + L/KD^2

R = 2L/KD^2

PARALLEL:

R = 1/R1 + 1/R12

R = KD^2/L + KD^2/L

R = 2KD^2/L