Two identical rods of copper and iron ar...

Two identical rods of copper and iron are coated with wax uniformly. When water, the length upto which wax melts are `8.4` cm and `4.2` cm respectively. If thermal conductivity of copper is `0.92`, then thermal conductivity of iron is :

`0.23`

`0.46`

`0.115`

`0.69`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

UNIT TEST PAPER NO.2
MODERN PUBLICATION|Exercise MCQ|25 Videos
UNITS, MEASURMENTS, DIMENSIONS, ERRORS OF MEASUREMENTS
MODERN PUBLICATION|Exercise Recent Competitive Questions|7 Videos

Similar Questions

Explore conceptually related problems

A' thermacole' icebox is a cheap and an efficient method for storing small quantities of cooked food in summer in particular. A cubical icebox of side 30 cm has a thickness of 5.0 cm. "if "4.0 kg of ice is put in the box, estimate the amount of Ice remaining after 6 h. The outside temperature is 45^(@) C and co-efficient of thermal conductivity of thermacole is 0.01 J s^(-1) m^(-1) K^(-1) . [Heat of fusion of water = 335 xx 10^(3) J kg^(-1) ]

Two slabs different materials with identical dimensions have their thermal condcutivities lambda_1 and lambda_2 respectively . When they are placed in contact with each other such that heat flows from one into the other ( placed in series ) , the equivalent thermal conductivity of the composite wall is given by

The resistance of solution of a salt occupying a volume between two platinum electrode 1.8cm apart and 5.4cm^(2) in area was found to be 30 ohm. Calculate the conductivity of the solutions.

A brass boiler has a base area of 0.15m^2 and thickness 1 cm. It boils water at the rate of 6 kg per minute when placed on a gas stove. Estimate the temperature of the part of the flame in contact with the boiler. Thermal conductivity of brass is =109Js^(-1)m^(-1)K^(-1) , Heat of vapourisation of water is 2256xx10^3Jkg^(-1)

MODERN PUBLICATION-UNIT TEST PAPER NO.4-MCQ

The difference between the apparent frequency of a source of sound as ...
Text Solution
|
An electric refrigerator abstracts 2000 calories from ice trays. The c...
Text Solution
|
A car travelling at 10" ms"^(-1) sounds a horn, which has a frequency ...
Text Solution
|
Two samples A and B of a gas are initially at the same temperature and...
Text Solution
|
At 16^(@)C two open organ pipes when wounded together produce 51 beats...
Text Solution
|
If the temperature of a black body is increased by 50% then the amount...
Text Solution
|
Beats are produced by two waves y(1)=asin2000pit, and y^(2)=asin2008pi...
Text Solution
|
A body cools from 60^(@)C to 50^(@)C in 10 minutes, when kept in air a...
Text Solution
|
The temperature of hot and cold end of a 20 cm long rod in steady stat...
Text Solution
|
Four indentical rods of same material are joined end to end to from a ...
Text Solution
|
A uniform rope of length 12 metres and mass 6 kg hangs vertically from...
Text Solution
|
A sphere of radius r, density d and specific heat S is heated to tempe...
Text Solution
|
The correct curve showing maximum emissive power E(m) and absolute tem...
Text Solution
|
In an adiabatic process wherein pressure is increased by 2/3%. If (C(p...
Text Solution
|
The (W/Q) of a Carnot - engine is 1//6. Now thw temperature of sink is...
Text Solution
|
A gas (gamma=1.5) is taken through adiabatic process in which volume i...
Text Solution
|
Two identical rods of copper and iron are coated with wax uniformly. W...
Text Solution
|
The motion of a particle executing simple harmonic motion is given by ...
Text Solution
|
When the temperature of an ideal gas is increased by 600 K, the veloci...
Text Solution
|
In Ingen Hauze's experiment, the wax melts up to lengths 10 and 25 cm ...
Text Solution
|