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What electronic circuit use a small current to control a large current?
Wiki User
∙ 11y ago
current amplifier
Wiki User
∙ 11y ago
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What is An example of a short circuit?
A short circuit is one that is characterized by extremely low resistance. This will result in the extremely dramatic increase of current. High current will flow until a safety device opens the circuit, or the weakest link in it burns out. And one of the two usually occurs in a moment or two.==Short Circuit happens when the cables of the electrical appliances are worn out or it's not connected properly,a short circuit may occure.A short circuit has a very low resistance that almost all electric current flow through it.It'll affect the operation of the electrical appliances.Owing to the heating effect,the excess electric current would produce a large amount of heat,wihout a fuse or a circuit breaker,a fire may be occured when there's a short circuit.
What is electronic resister?
Electronics resistor are a basic passive element it oppose the flow of current . the opposition depend upon the value of that resistance high value resistance will only able to flow some few amount of current through them. but low value of resistance allow to flow large current through them.
What does overloading an electrical circuit mean?
Current is supplied through metal, usually copper wires. Wiring within a typical house is divided into several circuits. Thus a group of lights in a room or group of rooms may be on a circuit. Also a group of power sockets (into which you can plug in toasters, radios, TV's etc.) may form a circuit. A clothes washer may be on a separate circuit. The clothes dryer may be on a separate circuit. The central Air Conditioning unit cum heating unit may be on a separate circuit. The electric stove and oven may be on a separate circuit and so on. The reason for segmenting the circuits is safety, cost, and Electrical Codes established by the government. Remember also that each of the circuits has its own circuit breaker. The current carrying capacity of a wire depends on its diameter. If the diameter is large it can carry more current. However bigger the diameter, more expensive is the wire. The architect and builder must first estimate the total amperes that will nominally be used by the house and ask the power company to provide say 100 Amp service or 200 Amp service etc. The power company will then provide wires and circuitry to the power box just outside the house capable of supporting that required amperes. The architect and the builder will then design circuits within the house to support the different appliances. Low consumption lights and fans may be on one circuit (smaller diameter wires) with its own circuit breaker for safety. High current consuming appliances will usually be on separate circuits (bigger diameter wires) with their own circuit breakers, again for safety. Now if you plug in an electric stove cum oven into a circuit designed and designated for lights, you will overload the circuit and hopefully the circuit breaker on the lights circuit will pop and cut off the current. If this safety feature was not there, then the light circuit which was designed to carry less current (small diameter wire) will now have to carry a much larger current to run the electric stove cum oven. The current carried will be too great for the small diameter wire and hence the circuit gets overloaded. If the circuit breaker was not there, the small diameter wire will be heated to a very high temperature and a wire accident will be imminent. HENCE IN A NUTSHELL OVERLOADING AN ELECTRIC CIRCUIT MEANS PASSING MORE CURRENT THAN THE CIRCUIT WAS DESIGNED FOR. Recognize that the voltage used also has an effect on the load characteristics of a circuit/appliance. Thus appliances designed for 110V use will pose problems when used with 220V including fire and electrocution. Circuit overloading occurs in audio circuits as well leading to frequency and/or amplitude distortion.
Why must you make current flow through the meter in order to measure it?
You don't. ...unless you want to directly measure the current in a circuit branch. That's the purpose of an ammeter. You can also use a volt meter if you know the resistance of a resistor in that branch to determine current (assuming DC circuit here) - current = voltage / resistance. This may be more useful for circuitry that is on a breadboard, since inserting an ammeter may not be practical.
Why is alternating current used for domestic purposes?
Alternating current is easier to distribute than direct current, because alternating current can be raised or lowered in voltage by a transformer. This allows very high voltages to be used in long distance transfer of electricity, which is then stepped down several times before being supplied to the end user. As the voltage is increased in a circuit, the current, as measured in amperes, decreases for a given load. This allows the use of lighter wire to transmit large amounts of electricity.
Can inserting a resistor in a circuit have an effect similar to an open circuit?
If the resistance is large enough, then there might not be enough voltage difference to allow much current. Since, Voltage = Current * Resistance, if resistance goes really large, and your voltage doesn't change, your current must decrease. An open circuit is where you do not have any current flowing, so whether no current verses very little current is the same is up to you.
What is a type of circuit where current by passes most resistance and large dangerous current flow?
A short circuit. In a properly installed system the fuse will blow to prevent a fire.
How current transformer measure current?
A current transformer doesn't 'measure current'. It merely reduces a large current flowing through its primary to a smaller current which can be read by an ammeter connected to its secondary. At the same time, it electrically isolates the secondary circuit from the primary circuit, which is essential if the primary circuit is part of a high-voltage system.
When a battery is hooked up to a short circuit?
The current will increase to a very large value
What is the difference between over current and overload condition?
The term, 'overcurrent', describes either an 'overload current' or a 'short-circuit current'.An 'overload current' is a current that is higher than a circuit's 'rated current'. For example, if you have too many loads plugged into the same circuit, then the resulting current is an 'overload current'.A 'short-circuit current' is a large current resulting when a line ('hot') conductor accidentally makes contact with either a neutral conductor or an earth (ground) conductor.
How does an electromechanical relay work?
All electrical relays consist of two circuits. 1.. A control circuit that utilizes a control voltage with a minimum current to switch a 2.. Power circuit requiring much greater current. The advantage of using this type of circuitry is that the switches or sensors that control large loads can be very small, {i.e. pilot switches, limit switches, sensors, etc.}, since they are the control switching device that can be capable of switching loads up to 600 amperes. This arrangement allows a very small wire size for controlling large loads. Without the use of relays, switches that control larger loads would be very expensive and occupy much more space.
What does the Electronic Level Control 20 amp fuse in the driver side fuse panel power on a 1995 88 royal?
When there is a large amount of weight on the back of your vehicle like a trailer or a heavy load in the trunk, the Electronic Level Control senses that weight and sends a message to the rear shocks to raise the back of the vehicle so that it is leveled out with the front of the vehicle. The fuse is for that circuit.
What are the functions of circuit breaker terminal?
A circuit breaker in a substation is a form of protection, designed to break fault current (the large volume of current that flows when a fault is detected on the system). It also has secondary function allowing the system operator to switch circuits in and out.
What is designed to use a small current to control a large current?
A silicon controlled rectifier falls into this category.
Does the current lead or lag the voltage in a series A C circuit containing a large value of capacitance?
ICE current leads the voltage by 90 degrees.
What will happen if a paper clip made of metal is placed in an electric circuit?
Metal is an excellent conductor of electricity. So a metal paper clip placed in an electric circuit will conduct whatever current may be in that circuit. If the current is very large, the paperclip may get hot.
What is meany by resistor?
Resistor is a component of an electric circuit that resist the flow of direct or alternating electric current . It can also limit or divide the current, reduce the voltage, protect an electric circuit, or provide large amounts of heat or light.
