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FAQ: What is the difference between convection and convection current?

A convection current is a process that involves the movement of energy from one place to another. It is also called convection heat transfer. The heat energy can be transferred by the process of convection by the difference occurring in temperature between the two parts of the fluid.

What is the difference between convection and conduction?

The mechanism of heat transfer from the hot body to the cold body due to free electrons is heat transfer by conduction. The mechanism in which heat transfer in fluids is due to the physical movement of molecules is convection heat transfer.

How are convection currents different?

Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.

How do you describe convection currents?

Convection currents form because a heated fluid expands, becoming less dense. The less-dense heated fluid rises away from the heat source. As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid.

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What is electric convection current?

(Or convective current.) Any net transport of electric charge effected through mass motions of some charged medium; any electric current induced by other than electrical forces.

What is convection and conduction current?

An example of a convection current is a cloud bearing free electrons that moves through the atmosphere driven by wind. Conduction current consists of charged particles moving in response to the electric field and not merely being carried by motion of the surrounding material.

What is the difference between convection and conduction and radiation?

In conduction, heat transfer takes place between objects by direct contact. In convection, the heat transfer takes within the fluid. In radiation, heat transfer occurs through electromagnetic waves without involving particles. The heat transfer takes place due to the difference in temperature.

What are convection currents 7?

A convection current is a process that involves the movement of energy from one place to another. It is also called convection heat transfer. The heat energy can be transferred by the process of convection by the difference occurring in temperature between the two parts of the fluid.

What is convection current in geography?

Convection currents, that occur within the molten rock in the mantle, act like a conveyor belt for the plates. Tectonic plates move in different directions. The friction between the convection current and the crust causes the tectonic plate to move. The liquid rock then sinks back towards the core as it cools.

Which is not example of convection current?

Boiling of an egg is not an example of convection. It is an example of conduction. As the heat is conducted from the boiling water to the egg.

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What is convection in simple words?

1: the action or process of conveying. 2a: movement in a gas or liquid in which the warmer parts move up and the cooler parts move down convection currents. b: the transfer of heat by convection foods cooked by convection — compare conduction, radiation.

What is the convection current and why it exists?

Convention Currents In Convection, it happens because of the heat transfer due to the bulk movement of molecules within fluids. Convection is such a process of heat transfer that takes place only in the cases of liquids and gases. The reason behind this is the free movement of molecules in such states of matter.

How does a convection current occur?

Convection currents occur when a reservoir of fluid is heated at the bottom, and allowed to cool at the top.. Heat causes the fluid to expand, decreasing its density. If there is cooler material on top, it will be more compact and therefore, will sink to the bottom. The heated material will rise to the top.

What are conventional currents?

Conventional current is the flow of a positive charge from positive to negative and is the reverse of real electron flow. Conventional current flows one way; electrons flow the other way. In AC circuits, current is constantly reversing direction.

What is effect of convection current?

Convection currents drive the movement of Earth’s rigid tectonic plates in the planet’s fluid molten mantle. In places where convection currents rise up towards the crust’s surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig. 7.21).

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