Convection

What happens in convection?

What are some examples of convection currents in Daily Life

What is the difference between sea and land breezes?

 A finned tube hot water radiator with a fan blowing air over it is kept in rooms during winter. The major portion of the heat transfer from the radiation is due to

What is forced convection? Give two examples.

The human circulatory system is an example of natural convection.

Define thermal convention.

In which of the following heat loss is primarily not due to convection?

Which of the following statement(s) is/are correct :-

I. Convection is a mode of heat transfer by actual motion of matter.

II. Convection is possible only in gases.

III. Convection can be natural or forced.

The convection current which arises when equatorial and polar regions of the earth receive unequal solar heat is called as:

Air is a bad conductor of heat or partly conducts heat, still, the vacuum is to be placed between the walls of the thermos flask because

While measuring the thermal conductivity of a liquid, we keep the upper part hot and lower part cool, so that

The equatorial and polar regions of the earth receive unequal solar heat. The convection current arising due to this is called:

Which of the following process does not occur through convection

A metal is heated in a furnace where a sensor is kept above the metal surface to read the power radiated ($P$) by the metal. The sensor has a scale that displays ${\log }_2\left(\frac{P}{P_0}\right)$, where $P_0$ is a constant. When the metal surface is at a temperature of $487 °\mathrm{C}$, the sensor shows a value $1$. Assume that the emissivity of the metallic surface remains constant. What is the value displayed by the sensor when the temperature of the metal surface is raised to $2767 °\mathrm{C}$?

A liquid of mass m and specific heat c is heated to a temperature 2T. Another liquid of mass $\frac{m}{2}$ and specific heat 2c is heated to a temperature T. If these two liquids are mixed, the resulting temperature of the mixture is

Two liquids $A$ and $B$ are at $32°\mathrm{C} \text{and} 24°\mathrm{C}.$ When mixed in equal masses the temperature of the mixture is found to be $28°\mathrm{C}$ . Their specific heats are in the ratio of

Assertion: In a room containing air, heat can go from one place to another by radiation only.

Reason: In convection, heat is transferred from one place to another by actual motion of heated material.

Statement 1 : A hot iron bar placed under a running tap loses heat by convection.

Statement 2 : Convection involves flow of matter within a fluid due to unequal temperature of its parts.

Which one of the following processes depends on gravity?