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Convection currents are caused by uneven heating of bodies of water/air, resulting in a current as hotter air/water rises, and cooler air/water sinks.
For example on a stove-top, when boiling water, the water at the bottom will warm first, being closest to the fire. Rising to the top, it will cool and sink to the bottom, creating a current.
That is why covering a pot is more efficient- when the hot water rises to the top due to a convection current, it cannot lose as much heat.
What else can I help you with?
What are the causes of crustal movements?
convenction!!
What causes the gobal convenction currerent between the equator and the poles?
the coriolis effect
In a liquid can the heat transfer both by conduction and convection?
yes. it is conduction on the surface to begin with. later on, it is convenction
What is applied to a conductor to cause current flow?
voltage is applied to a conductor to cause a current flow
Can freezing cause a density current?
No, trade winds and evaporation can cause a density current but not freezing.
Can Magnetism cause an electric current to flow in a conductor?
Yes, a MOVING magnetic field will cause electric current to flow in a conductor. Conversely an electric current flowing in a conductor will cause a magnetic field.
Does the magnetic field increase or decrease if the current is decreased?
An increase in an electrical current will cause magnetism to increase but a decrease in an electrical current will cause magnetism to decrease.
How does voltage cause current to do work?
A voltage will cause electrons or other charge carriers to flow (if there is a path through which they can flow). In other words, it will cause a current.
What forces cause current to move?
Voltage
A wire cannot cause a magnetic field if what?
A wire cannot cause a magnetic field if there is no current flowing through it. Magnetic fields are generated by the flow of electric current in a conductor.
Does lightning cause the air to break down and cause current flow?
A: Lightning is not the cause but the result when clouds or dust particle containing energy discharges its energy. Current will flow from positive to negative potentials
What type of connection will cause an overload current?
A connection between the "hot" and the neutral will cause an over current condition. In electrical terminology this is known as a short circuit.
