Q. 43.9( 155 Votes )

Two conducting wi A. 1 : 2

B. 2 : 1

C. 1 : 4

D. 4 : 1

Answer :

Suppose the resistance of each one of the two wires is R.

Case (i) When both wires are connected in series. Then, net resistance will be R+
R = 2R.

According to Ohms Law:

Current(I)=

Then, heat produced will be ( As H = I2 X R X T)


Case (ii) When both wires are connected in parallel. Then, net resistance will be


According to Ohms Law:

Current(I)=

Then, heat produced will be 


Now, The ratio after simplifying will be as follow:-


Thus, option (c) is correct.

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