Question Answers

Eleven identical rods are arranged as shown in figure. Each rod has length l, cross sectional area A and thermal conductivity of material L. Ends A and F are maintained at temperatures cross sectional area A and thermal conductivity of material L. Ends A and F are maintained at temperatures Eleven identical rods are arranged [...]

A circular ring (centre O) of radius a, and of uniform cross-section is made up of three different metallic rods AB, BC and CA (joined together at the points A, B and C in pairs) A circular ring (centre O) of radius a and of uniform cross-section is made up of three different metallic rods [...]

Seven identical rods of material of thermal conductivity k are connected as shown in the given figure. All the rods are of identical length l and cross-sectional area A. If the one end B Seven identical rods of material of thermal conductivity k are connected as shown in the given figure. All the rods are [...]

Two identical objects A and B are at temperatures TA and TB, respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T (TA > T > TB.) respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T (TA > T > [...]

Choose the correct statements from the following : (1) A temperature change which increases the length of a steel rod by 0.1% will increase its volume by nearly 0.3% Choose the correct statements from the following : (1) A temperature change which increases the length of a steel rod by 0.1% will increase its volume [...]

The temperature drops through a two-layer furnace wall by 900 C. Each layer is of equal area of cross-section. Which of the following actions will result in lowering the temperature The temperature drops through a two-layer furnace wall by 900 C. Each layer is of equal area of cross-section. Which of the following actions will [...]

A heated body emits radiation which has maximum intensity at frequency vm. If the temperature of the body is doubled then (1) the maximum intensity radiation will be at frequency A heated body emits radiation which has maximum intensity at frequency vm. If the temperature of the body is doubled then (1) the maximum intensity [...]

A hollow and a solid sphere of same material and identical outer surface are heated to the same temperature. (1) In the beginning both will emit equal amount of radiation A hollow and a solid sphere of same material and identical outer surface are heated to the same temperature. (1) In the beginning both will [...]

Two bodies A and B have thermal emissivities of 0.01 and 0.81, respectively. The outer surface areas of the two bodies are the same. The two bodies emit total radiant power at the same rate. respectively. The outer surface areas of the two bodies are the same. The two bodies emit total radiant power at [...]

Choose the correct statements from the following: (1) Good reflectors are good emitters of thermal radiation (2) Burns caused by water at 100 C Choose the correct statements from the following: (1) Good reflectors are good emitters of thermal radiation (2) Burns caused by water at 100 C October 25, 2020 Category: Uncategorised (JEE Advanced [...]