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What a conducter through which an electric current enters or leaves?
A conductor is a material that allows electric current to flow through it easily. Good conductors include metals like copper and aluminum.
What happens when an electric current enters leaves?
When an electric current enters a component, it carries energy and can cause the component to perform a function, such as generating light or heat. When the current leaves the component, it has already expended some of its energy, so the effect on the circuit or device may be different.
How would you define gold heat eletroscope?
A gold-leaf electroscope is a device that detects electric charges. It consists of thin gold leaves attached to a conductor that can be charged. When the leaves are charged, they repel each other due to electrostatic forces. This device is commonly used in physics experiments to detect the presence of electric charges.
What is a type of pressure that drives electrical charges through a circuit?
conductor is a material through which electric current flows easily.Electric charge is a basic feature of certain particles of matter that causes them to attract or repel other charged particles.Electric circuit is the path that an electric current follows.Electric current is the flow of electric charges.Electric field is the influence a charged body has on the space around it that causes other charged bodies in that space to experience electric forces.Electrode is a piece of metal or other conductor through which current enters or leaves an electric device.Electromagnetism is a basic force in the universe that involves both electricity and magnetism.Electron is a subatomic particle with a negative electric charge.Insulator is a material that opposes the flow of electric current.Ion is an atom or group of atoms that has either gained or lost electrons, and so has an electric charge.Kilowatt-hour is the amount of electric energy a 1,000-watt device uses in one hour.Neutron is a subatomic particle that has no electric charge.Ohm is the unit used to measure a material's resistance to the flow of electric current.Proton is a subatomic particle with a positive electric charge.Resistance is a material's opposition to the flow of electric current.Static electricity is electric charge that is not moving.Voltage is a type of "pressure" that drives electric charges through a circuit.Watt is the unit used to measure the rate of energy consumption, including electric energy. Current_Electricity">Current Electricity Electric current is the movement or flow of electric charges. A charge can be either positive or negative. The protons that make up part of the nucleus of every atom have a positive electric charge. The electrons that surround the nucleus have a negative charge. An electric current can consist of positive, negative, or both types of charges.The American statesman and scientist Benjamin Franklin originated the idea that electric current flows from positive to negative. But other scientists later proved that electric current actually flows in the opposite direction--from negative to positive.Franklin's idea also fails to describe the way electric current flows through metals. Each atom of a metal wire has at least one electron that is not held so closely by the nucleus as the others are. Such loosely held electrons can move freely through the metal. But the nucleus cannot move through the wire. Thus, current flowing through a metal wire consists of free electrons.Conductors and insulators. Electric current flows most easily through substances called conductors. The number of free electrons in a substance determines how well it conducts current. Such metals as aluminium, copper, silver, and gold are good conductors because they have at least one free electron per atom. Some metals, such as lead and tin, are poorer conductors than other metals because they have less than one free electron per atom. Poor conductors resist the flow of electric current more than good conductors do. Resistance changes electric energy into heat. Engineers use units called ohms to measure resistance (see OHM).Substances with no free electrons, such as glass, mica, and rubber, do not normally conduct electric current. They are called insulators. Some substances, including germanium and silicon, are neither good conductors nor insulators. They are called semiconductors (see SEMICONDUCTOR).To produce an electric current, some type of nonelectric energy must be converted into an electromotive force (emf). For example, a battery creates an emf by changing chemical energy into electrical potential energy. Thus, a battery has a potential difference (difference in potential energy) between its ends that causes electrons to flow in a conductor. Emf is measured in units called volts. An emf of one volt, when connected to a conductor with a resistance of one ohm, causes 6,241,500,000,000,000,000 electrons to flow past a point in the conductor in one second. This amount of electric current is called one ampere. See VOLT; AMPERE.Direct and alternating current. An electric current is either direct or alternating. Direct current (DC) always flows in the same direction. It is produced by batteries and DC generators. Alternating current (AC) regularly reverses its direction of flow. It is produced by AC generators. Nearly all homes and other buildings use AC.Each time AC completes two changes of direction, it goes through one cycle. The number of cycles per second is called the frequency of the AC. Frequency is measured in units called hertz. Power is generated at 50 hertz in some countries and 60 hertz in others.Direct current operates car electric systems, locomotives, and some types of motors used in industry. Radios, television sets, and other electronic devices use AC, but they also need DC to operate their internal circuits. Devices called rectifiers easily change AC into DC. DC is also necessary in order to charge storage batteries.Alternating current has several advantages over DC. Its major advantage is that power stations can transmit it easily and efficiently. Electric current loses the least amount of energy when travelling at high voltages. But these high voltages are not safe to use in homes. Devices called transformers can easily increase or decrease AC voltage.A conductor can carry more than one alternating current at a time. A current consisting of two more individual alternating currents is known as a polyphase current. One common kind of polyphase current is three-phase current, which consists of three individual alternating currents.
What happens to wavelength as a wave leaves the air and enters the perspex?
The wavelength bends forward as it leaves the air and enters the Perspex. The frequency of the wavelength will also increase.
What a conducter through which an electric current enters or leaves?
A conductor is a material that allows electric current to flow through it easily. Good conductors include metals like copper and aluminum.
What happens when an electric current enters leaves?
When an electric current enters a component, it carries energy and can cause the component to perform a function, such as generating light or heat. When the current leaves the component, it has already expended some of its energy, so the effect on the circuit or device may be different.
Is the electrode the metal or graphite rod in an electric cell?
Tt depends on the metal which is the cathode and which is the anode. However, in most cases, graphite is the cathode and the metal is the anode. the strictly correct answer is that BOTH the metal and the graphite rod are electrodes. You must have two electrodes minimum to create a cell.
Does resistance depend on whether the current leaves or enters the negative terminal?
No, resistance of a wire depends only on its nature, length and area.(R=pL/A) . It is independent on whether the current leaves or enters the negative terminals. By the way, current always flows from negative terminal of battery to its positive terminal,conventional current is nothing. But this is beyond the scope of the question!
What is the meaning of cathode?
The part of a voltaic battery by which the electric current leaves substances through which it passes, or the surface at which the electric current passes out of the electrolyte; the negative pole; -- opposed to anode.
4 substance that enters and leaves through the cell membrane?
food enters, waste leaves
How does an electric current pass through a conductor?
Ohm's law: V = I * R for a given temperature. The question seems to indicate we are not going to vary R. That leaves changing V. Increasing the voltage will increase the current. If the voltage is fixed too, we can lower the temperature of the conductor (most materials increase in resistance with rising temperature).
When a mature egg leaves the ovary it enters the?
It enters the oviduct
What is the part of the airport that determines what enters and leaves called?
Customs is the name of the department that determines what enters and leaves the country
What enters and leaves the cell?
it is the cellmembrain
What leaves the body cells and enters the blood then leaves the blood cells and enters the lungs?
NUTRIENTS AND OXYGEN also water, minerals, and vitamins
What is a positive or negative pole of an electrochemical cell?
They are called the electrodes or terminals. The parts of a cell where current leaves and enters the cell. The cathode is the positive, the anode is the negative.
