How long does electric current flow from the brain after it dies?
If "dead" means brain dead then you've answered your own question, there is no activity left.
1 person found this useful
The very word current means 'flow'. Electric current is the flow of electric charges. There are two kind of electric charges. Scientists considered the electric current as the… flow of positive charges. But in case of solid metals, only negatively charged electrons are able to move freely where as the positively charged protons are held firmly within the core of the atoms. So electric current is due to negatively charged electrons. Now we have to differentiate these two. How? Let us consider the current due to flow of positive charges as conventional current flow. Hence conventional current direction is always opposite to the direction of flow of electrons. To keep the charges in motion we need a force to push them. So we use a chemical cell which has electrical potential difference between the two terminals. This potential difference is named as " electro motive force", in short "emf". So emf is responsible to make electric charges to flow.
Of course. If you take the batteries out of a flashlight and put them back in pointing the other way, the current goes through the bulb in the opposite direction. It's so e…asy to reverse the flow of electric current that . . . -- the current coming out of a household electric socket reverses 120 times every second , -- the current in the antenna of your FM radio reverses roughly 200 million times every second -- the current in the antenna of your cellphone reverses almost 2 billion times every second, -- the current in the magnetron that makes the microwaves that heat your leftover meat loaf reverses 4.9 billion times every second.
Voltage is the pressure that pushes current through the resistance of the conductor. Ohm's Law: E=IR can be rewritten as I=E/R to explain this. "I" is the intensity measured i…n amps, "E" is the electromotive force measured in volts, and R is the resistance measured in ohms. Voltage divided by the resistance equals the amperage. The voltage pushes valence electrons out of orbit from one atom into the next atom.
There is no electricity inside of your brain.
Electricity can flow in an electric circuit by a battery. The battery creates electrons, which flow through the wire, and then go into a light bulb. (That is how a light bulb …in a circuit lights up.) A series circuit is a circuit with one wire that electrons can flow through. Also, there can be more than one light bulb connecting to the same wire. A parallel circuit is a circuit with light bulbs that have their own wire. Clarification The above answer, unfortunately, perpetuates the myth that current leaves a battery, and finds its way around a circuit. This is not the case at all. It is the load that 'draws' the current from the battery and it is the load that determines the size of that current.
Curren flow from high potential to low potential or simply, positive pole to negetive pole.
In a conducting wire, an electrical current will flow at about 2/3 the speed of light in a vacuum, or 200,000 km/sec. Note that the speed of the individual electrons is quite …a bit less, and the average speed of the electrons is less than a millimeter per second. It is the CURRENT that advances at 2/3 the speed of light, not the electrons. Answer The free electrons in a metal conductor move in random directions at a very high speed -a little less than the speed of light. This is the case whether or not a potential difference (or an electric field) is applied across the ends of that conductor. However, when a potential difference is applied, these randomly-moving electrons are slightly biased towards the positive end of the conductor. So if a randomly moving but unbiased electron would normally end up at, say, point A, within the conductor then, under an electric field, it would end up at point B instead -where point B is typically less than the diameter of an atom away from point A. So individual electrons move along a conductor at speeds in the order of millimetres per hour. As current is defined as a drift of electric charge (free electrons, in the case of metal conductors), this means that the velocity of this drift and, therefore, an electric current is very, v-e-r-y, slow! However, the effect of that current is felt immediately along the whole length of that conductor in much the same way that a number of railway wagons respond, practically instantaneously, to a small movement of just one of those wagons. Electric current is so slow that, in practical terms, it's unlikely that an individual electron will complete its journey through the filament of a flashlight within the lifetime of its battery!
In conventional current, current moves from positive to negative. In electron current, current moves from negative to positive.
To be precise, a current doesn't flow - a current "is". Although many people - including myself - often use the informal term "a current flows". The particles that make up the… current do flow - or move. An electrical current involves the movement of some type of charged particles. Often, these are negative electrons, but there are other possibilities, as well, especially positive holes, and negative or positive ions.
Though a conductor.A material through which electric current passes easily is known as conductor.
A: NO but the potential can exist until a path is found
There are many complex explanations for current flow in electronics. The answer below describes the basic requirements without including great detail. For a more academic disc…ussion, you are advised to look at relevant sections of text books on electrical and electronic engineering. In order for electrical current to flow, there must be two things: 1) A voltage (sometimes referred to as a "potential difference"). The voltage can be created by a battery, a generator, a solar cell or a mains voltage outlet. 2) A complete circuit. This must include conductors such as wires that start at the positive terminal of the voltage source and at the far end, return to the negative terminal of the voltage source. Other components such as lamps, resistors and switches can form part of the complete circuit. We must have a voltage for current to flow because without it, there is no "electrical force" to cause the current to flow. We need a complete circuit so that the current can flow from the positive of the voltage source, through conductors and return to the negative of the voltage source. Current will flow through any complete circuit. If a switch is part of the circuit, when it is open, no current can flow because the circuit has been broken. When the switch is closed, the circuit is complete and current will flow once again. Therefore, it is possible to have a voltage without a current (switch open, for example) but it is not possible to have a current without a voltage. NB: Mains electricity is alternating current. It follows the same principles as the DC examples mentioned above although there is a changing voltage rather than a constant voltage.
An electric current involves movement of charged particles, such as electrons, holes, or ions.
Electricity will always flow from the positive to the negative side of a battery or other power source as the excessive ?-trons try to move to the needy - side.
The potential difference between two point causes the electrons of the conducting medium to be attracted towards the positive ends and hence the currents flows from the positi…ve end to the negative end