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 __________.