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An electrical fuse is a device that sacrifices itself to provide over-current protection in an electrical circuit. If too much current flows, the fuse wire rises to a higher temperature and melts, thus opening the circuit, but destroying the fuse.A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by an overcurrent or short circuit. Its basic function is to interrupt current flow to protect equipment and to prevent the risk of fire.FUSE – A replaceable safety device for an electrical circuit. A fuse consists of a fine wire or a thin metal strip encased in glass or some fireresistant material. When an overload occurs in the circuit, the wire or metal strip melts, breaking the circuit.
Which of the following is a device that acts as an automatic switch that opens the circuit if too much current flows through it a battery B circuit breaker C switch D volts?
A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by an overcurrent or short circuit. Its basic function is to interrupt current flow to protect equipment and to prevent the risk of fire.
What is a device that acts as an automatic switch that opens the circuit if too much current flows through it?
FUSE – A replaceable safety device for an electrical circuit. A fuse consists of a fine wire or a thin metal strip encased in glass or some fireresistant material. When an overload occurs in the circuit, the wire or metal strip melts, breaking the circuit.
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Which device is used to control the flow of current in a circuit?
A switch is the device which controls the flow of current through a circuit. A switch is the device which controls the flow of current through a circuit.
What device automatically opens the electrical circuit to protect a three phase motor when an over current condition exists?
In the event of an overcurrent situation, fuses will blow or circuit breakers will trip. Although these devices protect the circuit against overcurrent conditions, they only open the circuit and disconnect the supply of electricity.
What is MCB?
MCB stands for Miniature Circuit Breaker. It automatically switches OFF electrical circuit during any abnormal condition in the electrical network such as overload & short circuit conditions. However, fuse may sense these conditions but it has to be replaced though MCB can be reset.
What is MCCB circuit breaker?
A moulded case circuit breaker (MCCB) is a type of electrical protection device that is used to protect the electrical circuit from excessive current, which can cause overload or short circuit.
Is a rheostat a resistor?
rheostat, adjustable resistor used in applications that require the adjustment of current or the varying of resistance in an electric circuit. The rheostat can adjust generator characteristics, dim lights, and start or control the speed of motors.
See some more details on the topic Which of the following is a device that acts as an automatic switch that opens the circuit if too much current flows through it? here:
Electrical Terms
REGULATOR – A device which controls the flow of current or voltage in a circuit to a certain desired level. RELAY – An electrical coil switch that uses a small …
What is a device that automatically operates an electrical …
The device is called a circuit breaker. It’s a special kind of switch. It has a stated current rating. If the current through it exceedes its design value, it …
How Circuit Breakers Work – Electronics | HowStuffWorks
Whenever electrical wiring in a building has too much current flowing through it, these simple machines cut the power until somebody can fix the problem.
What is a isolator?
An isolator is a device used for isolating a circuit or equipment from a source of power. An isolator is a mechanical switching device that, in the open position, allows for isolation of the input and output of a device.
What is a breaker switch?
A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by overcurrent/overload or short circuit. Its basic function is to interrupt current flow after protective relays detect a fault.
How does a switch control the flow of current in a circuit?
Electrical contacts inside the switch join the two terminals together. The connections link when you turn on the switch. As the switch is turned off, these contacts break. The current is controlled by the position in which the switch is located.
When the switch is on the electric circuit is open?
Electric current is a flow of electric charge. But current only flows in closed paths. No current can flow if the circuit is broken, for example, when a switch is open in the circuit ,current will not flow in any part of circuit as circuit is open and there is no closed path available for charge to flow.
What is used to change the current in a circuit?
The current in a circuit is directly proportional to the electric potential difference impressed across the circuit and inversely proportional to the resistance of the circuit. Reducing the current can be done by reducing the voltage (choice A) or by increasing the resistance (choice D).
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What is a circuit protective device that automatically blows and cut the current when an over load or short circuit happens?
Fuse – a circuit protective device that automatically blows and cut the current when and over load or short circuit happens.
Which device can be used as switch as well as protective device?
Fuse. In electrical circuits, a fuse is an electrical device used to protect the circuit from overcurrent. It consists of a metal strip that liquefies when the flow of current through it is high.
What is the device used to protect against over current and short circuit conditions that may result in potential fire hazards and explosion?
Overcurrent protection devices include circuit breakers and fuses.
What is ELCB and MCB?
MCB-Miniature circuit breaker, it will trip the load as per designed Rating and curve. ELCB-EARTH LEAKAGE CIRCUIT BREAKER,ELCB sensitive for earth leakege,Normally for domestic 30ma and Industriel 100Ma.
What is RCCB and MCB?
RCCB (Residual Current Circuit Breaker) and MCB (Miniature Circuit Breaker) are forms of circuit breakers that are used to disconnect the flow of electricity through a circuit whenever an electrical surge is detected. Isolators, on the other hand, are used to isolate a circuit or an appliance from the source of power.
What is MCB Byjus?
The full form of MCB is Miniature Circuit Breaker . It is a kind of electronic switch that functions automatically. It can detect a problem occurring inside a circuit by identifying the extreme amount of current flow in the circles.
Where is MCB and MCCB used?
The MCB is largely used in low circuit current, while MCCB is used for the heavy current circuit. The MCB is used for low energy requirements (domestic purposes), whereas the MCCB is used in high energy requirement regions (large industries).
Why is MCB used?
Miniature circuit breakers are used to safeguard homes from overload. Due to their capacity to handle large amounts of electricity, they are much reliable and safer than a fuse. One of the greatest advantages of an MCB is that it ensures equal distribution of electrical energy across all the devices.
What is the function of ELCB?
An Earth-leakage circuit breaker (ELCB) is a safety device used in electrical installations with high earth impedance to prevent shock. It detects small stray voltages on the metal enclosures of electrical equipment and interrupts the circuit if the voltage level exceeds danger threshold.
What is rheostat class 10th?
Definition. Rheostats are two-terminal devices, with one lead connected to the wiper and the other lead connected to one end of the resistance track. The rheostat is a variable resistor whose resistance can be changed to change the current flowing amount through a circuit.
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What is variable resistance and rheostat Class 10?
Answer: variable resistance is the resistance of a resistor . When two terminals are used it functions as a variable resistance and hence is called rheostat , it is used to control varying resistance.
What is a rheostat vs potentiometer?
The potentiometer is a three terminal device used for voltage control, while the rheostat is a two terminal device used for current control. Then the potentiometer, trimmer and rheostat are electromechanical devices designed so that their resistance values can be easily changed.
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