What does it mean when a switch in a circuit is closed or off .

1.When "closed", the entire circuit should be connected, and there should be an electric current passing through it; When "disconnected", the entire circuit is not connected, and no current is passed.

2."Switching" should refer to a state in which the circuit is on, and there is an electric current passing through it; And the "closing switch" should be an action, indicating that the circuit is connected.

3.When the switch is closed, there is a current passing through the voltmeter.

Naturally, there will be changes.

4.The disconnect switch should refer to disconnecting the circuit, after disconnecting, the circuit is not working, and naturally there is no current.

1.What does it mean when a switch in a circuit is "closed" or "off".

A:"Switch closing"Indicates that the circuit is energized"The switch is disconnected"It means that the circuit is not connected and the bulb does not emit light.

2.Does "switch close" mean the same thing as "switch close"?

A:"Switch closing"It's a state"Closing switch"Emphasis is placed on the action, first in the disconnected state, and then"Closing switch".But in general, the meaning is pretty much the same.

3.What does a closure switch mean? Why is the indication of the voltmeter different from the previous indication when the switch is closed?

A:"Closing switch"It means to turn on the power supply. The voltmeter reading is different, and it has something to do with series or parallel, maybe it was connected in series before and then in parallel. (PS: Do you have any pictures for this question that you haven't given.) )

4.What does the disconnect switch mean? Is there still current in the circuit after disconnecting the switch?

A:"Disconnect the switch"It means to disconnect the power supply, and the electrical appliance does not work. There is no current in the circuit after the switch is disconnected.

1 Closure means that the circuit is in a path state, and the current is allowed to pass through both ends of the switch.

2. The switch is turned on, and the switch is the action.

The difference between an open switch and a closed switch: when "closed", the whole circuit should be connected, and there should be an electric current passing through, while when "disconnected", the whole circuit is not connected and no current is passed.

We often see rural household electricity bus switches, including air switches and knife switches. Knife switches are not common in urban homes, but they are still very common in rural homes. However, in recent years, knife switches have gradually decreased and been gradually replaced by air switches.

Both types of switches have their own advantages.

So what should you choose when choosing a switch? The external structure of the knife switch The internal structure of the knife switch is a knife switch often used in the family, in addition to having a separation function, it also has a fuse (piece) of overcurrent fuse, this kind of switch has been used by most families because of its simplicity and cheapness.

Air switch air switch, also known as air circuit breaker, is also a kind of switch, but this kind of switch has the function of arc extinguishing in addition to the separation circuit and overcurrent fuse function of the knife switch. What is arc extinguishing? To extinguish an arc is to extinguish an arc.

An arc is the spark we see when we close or turn on a switch.

Electric sparks are relatively minor electrical discharges in the arc. Because this air switch has an arc extinguishing function, there is no electric spark when the switch is closed or disconnected, so its safety is better than that of a knife switch. So do you choose a knife switch or an air switch?

First of all, knife switches and air switches have their own advantages and disadvantages.

Comparison of the advantages and disadvantages of knife switch and air switch Therefore, the specific type of switch to use depends on what kind of effect you want. If you want to be able to see the obvious circuit disconnection point (you can clearly see the disconnection point people are more assured), choose the knife switch, after all, the air switch is disconnected and you can't see the disconnection point.

As for whether it is disconnected or not, it depends on whether the air switch is in a normal state; If you want to be a little safer and able to extinguish the arc, then choose the air switch, which is not bad for a few dollars anyway.

Closing switch refers to the closing switch after the circuit connection is completed, which is equivalent to turning on the circuit and constituting the path of current. The switch is equivalent to connecting a wire, the switch only plays a control role in the circuit, the switch is switched on and the closing circuit is turned on, and the electrical appliance can work; The switch is disconnected, the circuit is disconnected, and the appliance stops working.

Disconnecting the switch means turning the switch off, and the circuit is not open after disconnecting. That is, the switch is in a state of disconnection, which is equal to an open circuit.

Closing switch and disconnect switch are the two states of a switch.

Closing switch: It is to turn on the line, so that the line forms a loop, and there is a current passing through at this time.

Disconnect switch: In the case of closing the switch, the line is disconnected, so that the line can not form a loop, and there is no current passing through at this time.

The closing switch is to put the switch on to form a loop; To open is to disconnect, the circuit cannot form a complete loop, and five currents pass through.

Closing and disclosing like a knife switch, visible or clearly indicated. The moving and static contacts of the MCB are all encased in the shell, how do you know what the status of the MCB is without clear instructions? Disconnector.

Closing a switch is to turn on the output and input of the switch.

To disconnect a switch is to disconnect the output and input of the switch.

When turning on and off:

There is only one circuit, and the current is:

i1=(50+80) (5+20)=, clockwise direction.

ur1=uab=-ur1+us1=-26+50=24(v) after closing:

According to Davy Yunqinnan's theorem, when the switch is disconnected, the left part of the switch can be equivalent to a voltage source with an internal resistance of 4 open circuit voltage of 24V.

After closure: UAB = 24 (20 (20 + 4)) = 20 (v) A: 1UAB = 24V when the switch is disconnected, UAB = 20V after the switch is closedSame answer as the netizens upstairs.

The mold is rotten and the switch is closed, and the leakage indicates that the line is connected, and the switch is disconnected means that the line is open and the current cannot pass.

When "closed", the entire circuit should be connected, and there should be an electric current passing through it; When "disconnected", the entire circuit is not connected, and no current is passed.

On/off also refers to a state in which a circuit is on, with an electric current passing through it. If we say that the closing switch refers to an action, it means that the electric command is connected to several ways.

1. Closing switch: cut off the circuit breaker of the commonly used power supply and open the double-throw anti-reverse switch to the side of the self-provided power supply, and the self-provided electric power supply circuit breaker in the right of the automatic transfer switch box with dual power supply is in the disconnected state, and then start the standby power supply. When the unit is running to normal conditions, close the generator air switch, each circuit breaker in the self-provided power control cabinet, and finally close the standby power supply circuit breaker in the power switch box one by one, and send power to the required load to meet the power demand.

2. Broken switch: The switch should be in an open state when connecting the circuit, which is to prevent damage to the electrical appliances caused by short circuits in the circuit; At this time, according to Ohm's law formula i=u r, the larger the resistance, the smaller the current in the circuit, so as to avoid excessive current in the circuit and burn out the relevant components, in order to protect the circuit. Prevent damage to electrical appliances caused by short circuits in the circuit; Increase the resistance in the circuit to prevent excessive current in the circuit from burning out the components in the circuit

The disconnect switch means that it is turned off, that is, it does not work.

The closing switch means closing, that is, it is clear or not.