Question

Two conducting wires of the same material and of equal lentghs and equal diameters 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

c) 1:4

d) 4:1​

Answer 1

Answer:

d,4:1

Explanation:

because in series resistance is

R= R1+R2

while in parallel

1/R=1/R1+1/R2

and ratio become

ratio=R1+R2/1/R1+1/R2= 4:1

Answer 2

Hope this will be helpful