EASY

Earn 100

State the principle of method of mixtures.

Important Questions on Thermal Physics

EASY

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

Let heat is not lost by any other process between two objects in thermal contact, "Net heat lost (by hot body) $=$ Net heat gain (by cold body)."

Above statement indicates a principle. Write the name of that principle.

EASY

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

What temperature is the same on the Celsius scale as well as on the Fahrenheit scale?

EASY

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

What would be the final temperature of a mixture of

50 g

of water at

20 ° C

temperature and

50 g

of water at

40 ° C

temperature?

EASY

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside will:

MEDIUM

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

On what factors do the amount of heat required to raise the temperature of an object up to some fixed temperature depend?

EASY

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. What would be the corresponding reading in a Celsius thermometer?

HARD

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

A calorimeter has mass

100 g

and specific heat

0.1 kcal / kg ℃

. It contains

250 gm

of liquid at

30 ℃

having a specific heat of

0.4 kcal / kg ℃

. If we drop a piece of ice of mass

10 g

0 ℃

, What will be the temperature of the mixture? (Take Specific latent heat of fusion of ice as

80 \frac{cal}{g}

)

HARD

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

Heating effect per second of current t flowing through a conductor of resistance R when a voltage V is applied across it for 1 second is:

MEDIUM

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

How many thermometers are used in Hope's apparatus?

MEDIUM

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

200 gm

of a solid ball at

20 ° C

is dropped in an equal amount of water at

80 ° C

. The resulting temperature is

60 ° C

. This means specific heat of solid is -

EASY

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

In a barometer, mercury is preferred over water because:

MEDIUM

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

On what factors does the heat required by an object to increase its temperature depends?

MEDIUM

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

At what temperature (in degree celsius), the numerical values on Celsius and Fahrenheit scales become equal?

MEDIUM

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

How to determine the specific heat of liquid by using the method of mixtures?

MEDIUM

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

In the following problem, there is one question and three statements I, II and III given below the question. You have to decide whether the data given in the statements is sufficient to answer the question. Read all the statements carefully and find out which of the given statements is/are sufficient to answer the given question. Choose the correct alternative.

In which year was Amit born?
Statements:
I. Amit is six years older than Mahesh.
II. Mahesh's brother was born in 1982.
II. Amit's brother is 8 years younger than Mahesh's brother who is nine years younger than Mahesh.

EASY

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

What happens to the level of mercury in the barometer tube when it is taken down to a coal mine?

EASY

Physics>Waves and Thermodynamics>Thermal Physics>Change of State

The electric power of the heater is