Question

Two bars, A and B, each of length 2.0 m and cross sectional area 1.0 m², are placed end to end as shown in the figure.

The thermal conductivities of the bars are
k_A = 439 J/(s ⋅⋅ m ⋅⋅ K) and k_B = 887 J/(s ⋅⋅ m ⋅⋅ K), respectively. The left end of bar A is maintained at 373 K while the right end of B is maintained at 273 K.

Which one of the following statements is true concerning the above situation?

Time is not a factor in determining the quantity of heat conducted through these bars.

The time for a quantity of heat Q to pass through bar A is less than that for B.

For a given time t, the amount of heat transferred through bar A is smaller than that through B.

For a given time t, the amount of heat transferred through bar A is the same as that through B.

For a given time t, the amount of heat transferred through bar A is less than that through B.

Answer 1

Solution in the uploaded image