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What is designed to use a small current to control a large current?
Wiki User
∙ 12y ago
A silicon controlled rectifier falls into this category.
Wiki User
∙ 12y ago
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Why is the base current in transistor very small?
Because a transistor's collector current is proportionally limited by its base current, it can be used as a sort of current-controlled switch. A relatively small flow of electrons sent through the base of the transistor has the ability to exert control over a much larger flow of electrons through the collector.
What is the function of the capacitor?
control the flow of current..
How do transistors amplify weak signal?
A transistor controls the flow of current between the emitter and collector. The larger current is supplied by the power supply, across the emitter and collector. The flow is then controlled by a small current applied to the base connection. So, a large current flow mimics the small signal current. Limits are reached, when the transistor gets close to being fully switched on or off. This will cause distortion. To avoid this, more amplification is provided by a series of transistor amplifiers, one after the other.
What is meant by DC motor?
Only a DC motor uses direct current, and the reason is that it is the only supply available. There are also plenty of AC motors used when there is an AC supply. DC tends to be used for low-power devices like fans in electronic equipment.
What Type of current that almost all electronics devices use?
The question is much too vague. Electronic devices can be designed to allow for direct or alternating current. Examples are your home DVD player plugged into the receptacle which is 120 volt alternating current and your ipod which uses battery direct current power. Small portable devices are usually direct current (battery power ). The plug that comes with such devices is for charging the battery. Or the device may internally rectify the alternating current and turn it into dc power.
What electronic circuit use a small current to control a large current?
current amplifier
Does a transistor allows control of large currents with small current signals?
Yes. The ratio of collector current and base current is DC gain, also known as beta, or hFe.
Location for fuel injector relay 1988 Ford Ranger 2.3 liter?
a relay is used, so that a small amount of current can control a large amount of current. in the case of fuel injectors, there is not a large amount of current, therefore, there is no fuel injector relay.
When measuring a large current flow should you use a shunt with zero resistance?
It is not a shunt with zero resistance. It is very small, but it is not zero. The large current develops a small voltage across the small resistance. Measuring that small voltage gives you a proportional measurement of the current.
Which starting system component uses a small amount of current to control a large amount of current?
I think its a starter solenoid or a relay. I know relays take high voltage current to power low voltage circuits. Hope that helps..
What is the use of transistor in water level indicator?
It is used to amplify the current. The common-emiiter amplifier is designed so that a small change in voltage (Vin) changes the small current through the base of the transistor; the transistor's current amplification combined with the properties of the circuit mean that small swings in Vin produce large changes in Vout. Various configurations of single transistor amplifier are possible, with some providing current gain, some voltage gain, and some both.
The transistor acts like a diode and?
Yes, the transistor acts like a diode. That is, essentially, what it does. What it also does, and what give it its added value and ability to amplify, is that the base current causes the collector-emitter "diode" junction to vary in its turn-on characteristic. With this ability, you can control a large current with a small current, and a small delta-current in the base causes a larger delta-current in the collector, the ratio being hFe, hence the term "gain".
What are the purposes of Christmas light controllers?
A Christmas light controller is a component that can be used to control large amounts of voltage or current with just a small voltage. Visit the instructables website for more information.
What are or relay circuits used for?
A relay is used to switch a different voltage and/or current, to the control signal.Examples:1) Low voltage electronic signals operate a relay, which can then control mains voltages and high currents. This isolates potential harmful voltages from getting into the low voltage electronics.2) The control switch may be some distance from a high power unit. Instead of running large cables and using large clumsy switches to control it, small low voltage, low current cables, can be used instead. Using a relay close to the unit to keep the price down and danger away from the operator.3) The starter motor on a vehicle, uses massive amounts of current and have thick cables to supply it. These large cables are not routed through to the ignition switch. Instead, small cables are used at low current, to operate a solenoid right at the motor. This is a relay.
What does the horn relay do in a 1963 Chevy 2?
A relay is a device that uses a small control current to switch a larger current. So the horn button (small current) turns on the relay which in turn energizes the horn (heavy current device).
How does a transistor function as an amplifier?
A: The small base current will control the collector current flow by adding a resistor this changes of current flow will be evident as a voltage amplifier.
The control of a commodity or service by a small number of large powerful companies is called?
monopoly
