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What are two things required to make electric current flow in a circuit?
Wiki User
∙ 9y ago
you need an electrical supply and a load. nice and simple.
Wiki User
∙ 15y ago
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Is electric potential difference a vector?
We generally think of electric current as a scalar quantity. When we think of 1/4th amp or 20 amps, we think of an amount (a scalar quantity) of current flow. On another plane, the electromagnetic forces at work in current generation are actually force vectors. In the traditional sense, electric current, which is the movement of electrons, is from negative to positive. This is not a vector, though. In the macro or "large" world, think of current as scalar.---------------------------------------------------------------------The beauty is that though current is not a vector definitely its direction of flow is used to make length as vector. I is not vector. dl is not vector but I dl will be considered as vector. So innovative and essential concept.Current density is a vector which appears in Maxwell's equations.
How is adding a ammeter to a circuit different from adding a light bulb?
When you add a light bulb, you are adding a load, which performs a function - in this case, it converts electrical energy to light and heat energy. When you add an ammeter, most of the time you intend to measure the current in the circuit, which is the function of the ammeter. Thus the two electrical components differ in their function and does different things when added to a circuit.
Why does a simple circuit make things work?
The most basic electrical circuit consists of a power supply (source) and a 'load'. Here are some basic examples; AC & DC respectively: * Household AC + Lightbulb * Car Battery + Starter * Car Battery + Horn A typical electrical circuit could be a 'source', 'load', & switch: * Household AC (wall socket), + lamp + lightswitch * Car Battery + Starter + ignition switch (key turning) * Car Battery + Horn + Sensor Switch on Steering wheel (to blow the horn) Another typical circuit could be; Source, Load, Switch, Feedback device: * Household AC + Clothes Dryer + Start Button + "On" light * Car Alternator + Radio + Radio 'On' Switch + Radio 'On' LED
What are elctromagnets used for?
Electromagnets are used in things that have moving parts, eg. CD players, heads on Hard drives, automatic doors in a grocery store, electric windows, motors etc., Some examples include: You can slide the bolts of locks and latches, tap out telegraphic dots and dashes, open and close switches in distant electric circuits. The rotors of all electric motors are spun by electro-magnetism. A relay is a device which uses a low current circuit to switch high current circuit on/off. A large relay system is used in cars for switching the starter motor, because it draws a very big current. When the switch in the low current is closed it turns the electro magnet on, this attracts the iron rocker. The rocker pivots and closes the contacts in the high current circuit. When the low current switch is opened the electro-magnet stops pulling, the rocker returns and the high current circuit is broken again. Electro-magnets have been used in hospitals to remove particles of metal ( those which are magnetic- because not all common metals are magnetic, e.g. aluminium, copper, brass, gold, silver), which may have lodged in people's eyes after an accident. Some large cranes in scrapyards are electromagnetic. The electro-magnet is made up of a big coil of wire, with many turns and a soft iron core. The crane lifts large pieces of metal when the current is switched on and drops its load when the current is switched off. A circuit breaker, also called a resettable fuse is electro-magnetic. This is placed on the incoming live wire. If the current gets too high the magnetic field in the coil pulls the iron rocker which "trips" the switch and breaks the circuit. It can be reset manually but will always switch itself off if the current is too high. quote from Zephyrus: Interactive Education on the web http://www.zephyrus.co.uk/electromagnetsanswer.html
What are parts of the simple circuits?
A simple circuit contains the minimum things needed to have a functioning electric circuit. It requires three things: 1. A source of electrical potential difference or voltage. (typically a battery or electrical outlet) 2. A conductive path which would allow for the movement of charges. (typically made of wire) 3. An electrical resistance (resistor) which is loosely defined as any object that uses electricity to do work. (a light bulb, electric motor, heating element, speaker, etc.) Despite being considered simple, such circuits are useful and quite common. Examples include flashlights and doorbells. it also needs a way to get to the light and a way back from the light so it can function properly or even work at all.
What happened to the electrodes as a result of the electric current flowing?
Several things happened to the electrodes as a result of the electric current flowing. The electrodes conduct the electrical current and makes the circuit complete.
Is electric current stored anywhere?
Electric current is the movement of charge around a circuit and so cannot really be stored, however, the energy which it carries is stored in most things.
What makes an electric cuchi?
An electric current relies on several things. First, there must be a continuous connection of conductors. Then there must be a voltage or a potential difference between two parts of a circuit. It is the voltage that causes electrons to move, so generating an electric current. The amount of current depends on both the voltage and the resistance of the circuit. The higher the voltage, the greater the current. The higher the resistance, the lower the current will be.
An electric DC circuit is attached to a 12 volt battery and has a 3 ohm resistor in it find the current flowing through the circuit?
If the 3-ohm resistor is the ONLY thing in the circuit, then the current flowing through it is (12 volts)/(3 ohms) = 4 amperes. If there are other things in the circuit besides the resistor, then the current depends on all of them.
A complete electric circuit includes a voltage source current wires and something to ground the flow of current?
If you ground the flow of current like the last part of your question states you will not have a complete circuit as the circuit will open on a short circuit. To make a complete circuit operate you need a power source, an overload device to protect the conductors of the circuit, conductors to carry the current and a load across the power source which causes the current to flow in the circuit. Leave any one of these things out and you will not have a complete circuit.
What are the two things needed to make current flow in electricity?
A flow of electrons is needed to have a current. And there (usually) must be a complete circuit. And you need a voltage to make the current move around your circuit. All tied up in Ohms Law - which I'll leave to you.
What are to things needed in order for current to flow in a circuit?
voltage and ground
Does current get lost in a circuit?
No. Current does not get lost in a circuit. By Kirchoff's Current Law, the signed sum of currents entering a node is zero, which means that the current at every point in a series circuit is the same. Power may get lost, by conversion to heat, but do not confuse power, voltage, and current - they are three different things.
What three things do you need for electric current?
protons,neutrons and electrons
What do electric currents do?
They can kill you.Yes, electric currents can kill you, but only if it is very strong. Electric current can do many things. Electric current is run through wires mostly to push certain things. In a lightbulb, the current is restrained and the energy created by the current is turned into heat and light energy. In a fan, the electric current is used to turn the rotor which produces kinetic energy.Electric current is able to do tons of different things, and are used in most aspects of our daily life.AnswerThe original answer is quite wrong in suggesting that only a 'very strong' electric current can kill you! In fact a current of just 30-odd milliamperes will kill you. This is a very small current (e.g. a 60-W /230-V lamp draw a current of 260 mA!
What can an electric currents do?
They can kill you.Yes, electric currents can kill you, but only if it is very strong. Electric current can do many things. Electric current is run through wires mostly to push certain things. In a lightbulb, the current is restrained and the energy created by the current is turned into heat and light energy. In a fan, the electric current is used to turn the rotor which produces kinetic energy.Electric current is able to do tons of different things, and are used in most aspects of our daily life.AnswerThe original answer is quite wrong in suggesting that only a 'very strong' electric current can kill you! In fact a current of just 30-odd milliamperes will kill you. This is a very small current (e.g. a 60-W /230-V lamp draw a current of 260 mA!
What happens to electric current as voltage gets large?
If the resistance of the load is kept more-or-less constant, then the current also becomes larger. On the other hand, if the power of the load is kept more-or-less constant, then the current becomes smaller.
