Physics-
General
Easy
Question
Two rods of the same length and diameter having thermal conductivities K1 and K2 are joined in parallel. The equivalent thermal conductivity of the combination is
The correct answer is:
Related Questions to study
Chemistry-
If the solubility of lithium sodium hexafluoro aluminate, Li3Na3 (AlF6 his' S' mol L-1, its solubility product is equal to:
If the solubility of lithium sodium hexafluoro aluminate, Li3Na3 (AlF6 his' S' mol L-1, its solubility product is equal to:
Chemistry-General
Chemistry-
How many times has a solution of pH2 higher acidity than a . . .... solution of pH6?
How many times has a solution of pH2 higher acidity than a . . .... solution of pH6?
Chemistry-General
Chemistry-
100 mL of 0.1 M HCI is mixed with 100 mL of 0.0 I M HCI. The pH of the resulting solution is:
100 mL of 0.1 M HCI is mixed with 100 mL of 0.0 I M HCI. The pH of the resulting solution is:
Chemistry-General
Chemistry-
The ionisation constant of NUX in water is 
act. The rate constant of the reaction of NH t and OH- to form NH3 and H20 at 25°C is 3.4 x 1O1O L mral s-I. The rate constant for proton transfer from water to NH3 is:
The ionisation constant of NUX in water is act. The rate constant of the reaction of NH t and OH- to form NH3 and H20 at 25°C is 3.4 x 1O1O L mral s-I. The rate constant for proton transfer from water to NH3 is:
Chemistry-General
Chemistry-
p Ka values of four acids are given below at 25°C. The strongest acid is:
p Ka values of four acids are given below at 25°C. The strongest acid is:
Chemistry-General
Chemistry-
The pH of an aqueous solution of 0.1 Solution of the salt of a weak base
and a strong acid is:
The pH of an aqueous solution of 0.1 Solution of the salt of a weak base and a strong acid is:
Chemistry-General
Chemistry-
In the hydrolytic equilibrium 
. The degree of hydrolysis of 0.00 I M solution of the salt is:
In the hydrolytic equilibrium . The degree of hydrolysis of 0.00 I M solution of the salt is:
Chemistry-General
Physics-
If the ratio of specific heat of a gas at constant pressure to that at constant volume is y, the change in internal energy of a mass of gas, when the volume changes from V to 2V at constant pressure P ,is
If the ratio of specific heat of a gas at constant pressure to that at constant volume is y, the change in internal energy of a mass of gas, when the volume changes from V to 2V at constant pressure P ,is
Physics-General
Physics-
When the state of a gas adiabatically changed from an equilibrium state A to another equilibrium state Ban amount of work done on the stystem is 35J. If the gas is taken from state A to B via process in which the net heat absorbed by the system is 12 cal, then the net work done by the system is(1cal=4.19J)
When the state of a gas adiabatically changed from an equilibrium state A to another equilibrium state Ban amount of work done on the stystem is 35J. If the gas is taken from state A to B via process in which the net heat absorbed by the system is 12 cal, then the net work done by the system is(1cal=4.19J)
Physics-General
Physics-
A reversible engine converts one-sixth of the heat in put in to work. When the temperature of the sink is reduced by 62
C,the efficiency of the engine is doubled. The temperatures of the source and sink are
A reversible engine converts one-sixth of the heat in put in to work. When the temperature of the sink is reduced by 62C,the efficiency of the engine is doubled. The temperatures of the source and sink are
Physics-General
Physics-
Four curves A,B,C and D are drawn in the figure for a given amount of a gas. The curve which represent adiabatic and isothermal changes are
Four curves A,B,C and D are drawn in the figure for a given amount of a gas. The curve which represent adiabatic and isothermal changes are
Physics-General
Physics-
5.6 litre of helium gas at SIP is adiabatically compressed to 0.7 litre. Taking the in initial temperature to be T1,the work done in the process is
5.6 litre of helium gas at SIP is adiabatically compressed to 0.7 litre. Taking the in initial temperature to be T1,the work done in the process is
Physics-General
Physics-
In a Carnot engine, the temperature of reservoir is 927Cand that of sink is 27C. If the work done by the engine when it transfers heat from reservoir to sink is 12.6 
106J,the quantity of heat absorbed by the engine from the reservoir is
In a Carnot engine, the temperature of reservoir is 927Cand that of sink is 27C. If the work done by the engine when it transfers heat from reservoir to sink is 12.6 106J,the quantity of heat absorbed by the engine from the reservoir is
Physics-General
Physics-
A diatomic ideal gas is compressed adiabatically to 1/32 of its initial volume. If the initial temperature of the gas isT1(in Kelvin) and the final temperature is aT1,the value of a is
A diatomic ideal gas is compressed adiabatically to 1/32 of its initial volume. If the initial temperature of the gas isT1(in Kelvin) and the final temperature is aT1,the value of a is
Physics-General
Physics-
The specific heat capacity of a metal at low temperature(7) is given as
A 100g vessel of this metal is to be cooled from 20 K to 4 K by a special refrigerator operating at room temperature(27C). The amount of work required to cool in vessel is
The specific heat capacity of a metal at low temperature(7) is given asA 100g vessel of this metal is to be cooled from 20 K to 4 K by a special refrigerator operating at room temperature(27C). The amount of work required to cool in vessel is
Physics-General
