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What is used to control current and potential difference in a circuit?
Wiki User
∙ 15y ago
A switch controls the flow of the circuit by making or breaking the connection, so you get full flow or nothing.
In electronics, vacuum tubes or semiconductors, can also be used to control the flow by varying amounts.
Wiki User
∙ 12y ago
Wiki User
∙ 15y agoThe answer resistant is correct. Additionally, current and or voltage is controlled and or impacted upon by some form of opposition in the circuit. They come mainly in the form of resistance (R), inductance (L) or capacitance (C), either independently or combined - termed impedance (Z). The opposition to the flow of current and or drop in voltage is affected/ controlled by these parameters. Ohm's Law
Wiki User
∙ 12y agoNot a tool but an electrical component.
A rheostat or variable resistor is used to control current. Another way is
to use a variable voltage supply and keep the resistance constant.
If the current in the circuit is AC, then you can also control it with inductance (coils)
and capacitance (capacitors). But those don't do a thing for DC.
Wiki User
∙ 11y agoThe simplest form of control is a switch, e.g. a light switch.
However, switches can come in other forms - transistors in circuits can vary the current in an electrical circuit.
Variable resistors, such as a manual volume control on an audio amplifier control electricity flow, although with the exception of industrial applications, this is usually done only for low-power devices due to heat dissipation issues.
Insulators also prevent unintended flow of electrical current. The simplest insulator is an air gap, but in industrial applications such as power pylons and on overhead cables of electric railway lines, large, ceramic insulators are used.
Within circuits, many different devices are used - sometimes alone, or in combination - to control the flow of electricity to produce a specific outcome.
Wiki User
∙ 12y agoBy using variable resistance connected as a rheostat.
Wiki User
∙ 13y agoresistor
Wiki User
∙ 11y agoSwitch la
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What is th potential difference that causes charges to move in a circuit?
The answer is voltage, resistance, electric discharge, and current. It is caused by a difference in energy stability between two points that favors a charge to move down a potential difference.
What stops the current flowing in a circuit?
Current will cease when either or both the potential difference across the load is Zero or when the load, itself, is Infinite in resistance or impedance.
What causes potential difference?
A potential difference causes an electric current. Think of it like a river : the source of water is the most elevated point of the river, so the water has a lot of gravitational potential energy. The end of the river is the lowest point of it, so the water has very low gravitational potential energy. What happens between these two points? Water flows! This analogy can be applied to electricity; the potential difference is caused, for example, by a battery in an electric circuit.
What is the terminal potential in the short-circuit?
in the case of short-circuit the current is maximum hence the terminal potential is becomes zero
What does a current flow of electrons need?
Your question is not clear. A current is generated when a group of electrons flow through a conductor, and this happens when there is a potential difference between the 2 ends of the conductor. If you want to know how can we start the flow of electrons it is by creating a potential difference in between the 2 ends of the conductor.
What type of current has steady potential difference across a circuit?
That would be DC or Direct Current.
When does current stop flowing in a circuit?
Current flows in a circuit when there is a difference in electronic potential between two points.
What happens to current in a simple circuit as potential difference is increased?
depends on the simple circuit. please describe it.
Does potential difference change with change in resistance?
Changing the potential difference in a circuit does not change the resistance. Rather, it changes the current.
What conditions are necessary for a current to be present in a circuit?
some resistance and potential difference
How does voltage produce current?
Voltage across two terminals mean there exists a potential difference, and when the circuit gets closed, due to this potential difference the current flow.
If there are 2 points with different potential energy will there still be an electrical current through the circuit?
Not necessarily. The two points with potential difference, will have to be connected via a conductor, for current to flow.Provided that a circuit exists, then current WILL flow.
What is basic difference between Potential meter and rheostate?
Potential meter is voltage control device and rheostate is current control device. it is a basic difference.
Is a car battery a circuit?
Hi, there. A battery is a power supply, a source of potential difference which drives current. In itself, a battery is not a circuit, but if you attach it to a load (a resistance), then a current will form and a circuit is made!
What happens in a circuit to voltage when current flows?
A: There is a relationship one needs the other both can coexists but not each alone.
When the potential is high the current passing through a conductor it is also high true or false?
I think you mean when the 'potential difference' is high, is the current also high? The answer is that it depends on the impedance (a.c.) or resistance (d.c.) of the circuit. If this remains constant, then raising the potential difference will cause the current to increase too.
8 If the resistance of an electric circuit is 12 ohms and the voltage in the circuit is 60 V the current flowing through the circuit is?
There is a simple equation relating voltage (properly potential difference), current and resistance: V=IR Where V=potential difference, I=current and R=resistance So to answer: I=60/12 I=5
