Three identical rods `AB`, `CD` and `PQ` are joined as shown. `P` and `Q` are mid points of `AB` and `CD` respectively. Ends `A`, `B`, `C` and `D` are maintained at `0^(@)C`, `100^(@)C`, `30^(@)C` and `60^(@)C` respectively. The direction of heat flow in `PQ` is

In the adjacent figure, AC= PR and C, R mid points of AB and PQ respectively.S.T. AB = PQ.

Two rods of same material and thickness are joined as shown below. The ends X and Y are maintained at X^(@)C and Y^(@)C respectively. The ratio of the heat flow in the two rods is –

A rod CD of thermal resistance 5.0KW^(-1) is joined at the middle of an identical rod AB as shown in figure. The ends A, B and D are maintained at 100^(@)C , 0^(@)C and 25^(@)C respectively. Find the heat current in CD.

A rod CD of thermal resistance 5.0KW_(-1) is joined at the middle of an identical rod AB as shown in figure. The ends A , B and D are maintained at 100^(@)C , 0^(@)C and 25^(@)C respectively. Find the heat current in CD .

A rod CD of thermal resistance 5.0KW_(-1) is joined at the middle of an identical rod AB as shown in figure. The ends A, B and D are maintained at 100^(@)C , 0(@)C and 25(@)C respectively. Find the heat current in CD.

A rod CD of thermal resistance 5.0KW^(-1) is joined at the middle of an identical rod AB as shown in figure. The ends A, B and D are maintained at 100^(@)C , 0^(@)C and 25^(@)C respectively. Find the heat current in CD.

Three conducting rods AB, BC and BO made of same material and same cross section are arranged as shown in the figure. Temperatures at the points A, O and C are maintained at 20^(0)C, 90^(0) C and 0^(0) C respectively. The ratio of lengths of BO to BC when there is no beat flow in AB, is

If a,b in N , PQRS is a square and P, Q, R, S are mid points of AB, AD, CD, BC respectively then a+b is

Two identical rods AB and CD, each of length L are connected as shown in figure-4.22. Their cross-sectional area is A and their thermal conductivity is k. Ends A, C and D are maintained at temperatures T_(1),T_(2) and T_(3) respectively. Neglecting heat loss to the surroundings, find the temperature at B.

A rod CD of thermal resistance 10.0KW^(-1) is joined at the middle of an identical rod AB as shown in figure. The ends A, B and D are maintained at 200^(@)C , 100^(@)C and 125^(@)C respectively. The heat current in CD is P watt. The value of P is __________.