Physics-

General

Easy

Question

# Two identical square rods of metal are welded end to end as shown in figure (i), 20 calories of heat flows through it in 4 minutes. If the rods are welded as shown in figure (ii), the same amount of heat will flow through the rods in

- 1 minute
- 2 minutes
- 4 minutes
- 16 minutes

## The correct answer is: 1 minute

### Thermal resistance]

and are same]

### Related Questions to study

chemistry-

The decreasing order of boiling points of 1 , 2 , 3, alcohol is:

The decreasing order of boiling points of 1 , 2 , 3, alcohol is:

chemistry-General

maths-

### In ΔABC, if then

### In ΔABC, if then

maths-General

chemistry-

### Consider the following reaction,

### Consider the following reaction,

chemistry-General

physics-

### A liquid cools down from to in 5 minutes. The time taken to cool it from to will be

### A liquid cools down from to in 5 minutes. The time taken to cool it from to will be

physics-General

Maths-

### If one of the lines in the pair of stright lines given by bisects the angle between the coordinate axes, then k

### If one of the lines in the pair of stright lines given by bisects the angle between the coordinate axes, then k

Maths-General

chemistry-

Order of reactivity of halogen acids towards an alcohol is

Order of reactivity of halogen acids towards an alcohol is

chemistry-General

chemistry-

Which of the following is an example of elimination reaction?

Which of the following is an example of elimination reaction?

chemistry-General

physics-

### A body cools in a surrounding which is at a constant temperature of . Assume that of obeys Newton’s law of cooling. Its temperature is plotted against time . Tangents are drawn to the curve at the points and . These tangents meet the time axis at angles of and , as shown

### A body cools in a surrounding which is at a constant temperature of . Assume that of obeys Newton’s law of cooling. Its temperature is plotted against time . Tangents are drawn to the curve at the points and . These tangents meet the time axis at angles of and , as shown

physics-General

chemistry-

### The most unlikely representation of resonance structures of nitrophenoxide ion is

### The most unlikely representation of resonance structures of nitrophenoxide ion is

chemistry-General

chemistry-

### is stronger acid than because:

### is stronger acid than because:

chemistry-General

Maths-

### In the figure, area and Find area of

### In the figure, area and Find area of

Maths-General

Maths-

### In the given figure, area (parallelogram ABCD) = 48 and Find area of

Hence option C is correct

### In the given figure, area (parallelogram ABCD) = 48 and Find area of

Maths-General

Hence option C is correct

maths-

### In the given figure ABC is right angled at B in which BC = 15 cm, and CA = 17 cm Find the area of acute-angled triangle DBC, it being given that

### In the given figure ABC is right angled at B in which BC = 15 cm, and CA = 17 cm Find the area of acute-angled triangle DBC, it being given that

maths-General

physics-

### Two rods P and Q have equal lengths. Their thermal conductivities are K_{1} and K_{2 }and cross sectional areas are A_{1} and A_{2}. When the temperature at ends of each rod are T_{1} and T_{2} respectively, the rate of flow of heat through P and Q will be equal, if

### Two rods P and Q have equal lengths. Their thermal conductivities are K_{1} and K_{2 }and cross sectional areas are A_{1} and A_{2}. When the temperature at ends of each rod are T_{1} and T_{2} respectively, the rate of flow of heat through P and Q will be equal, if

physics-General

physics-

### The graph shows the variation of temperature of one of a material with the heat supplied to it. At the substance is in the solid state. From the graph, we can conclude that

### The graph shows the variation of temperature of one of a material with the heat supplied to it. At the substance is in the solid state. From the graph, we can conclude that

physics-General