All three wires, the "hot", neutral and the ground must all maintain the integrity of the circuit. This is why pigtails are connected from the main circuitry to the receptacle or switch devices so that they can be removed without opening the electrical circuit.
A fuse will not work successfully if it is connected in parallel with the device it is supposed to protect.First, it will blow because it has no resistance in series with it. Second, once it blows, the device still has power applied to it. Fuses must be wired in series.
The capacities of batteries are rated in amp hours. The higher the amp hour rating of a battery the longer the device connected to the battery will operate. Depending on what the connected load draw in amps is, will determine how long the connected device will operate.
Using a transformer with a higher capacity that is needed by the device connected to it will not damage the device. This is as long as the voltage the device needs is the same as the transformers output.
When a switch is open (wires not connected) it is considered off. When a switch is closed it is considered on. If you move a switch and the wires are not connected the the circuit is open and current cannot run throughout the circuit to power the device.
The ground connected to metal parts ensures that no voltage potential can exist on the metal part where it could shock the user of the device. If the hot wire does touch the metal case because of some fault in the device the breaker will trip or the fuse will blow that protects the circuit.
A device to test if wires are electrically connected. Typically a small lightbulb and a battery are used.
A continuity tester.
A thermostat is the temperature controlling device
a thermostat
1) A continuity tester is a simple device consisting of two testing probes and a light (LED) or buzzer indicator. It is used to detect the presence of continuity or a break in between the two ends of a conductor which is connected to its testing probes. For instance, if the two probes of a continuity tester are touched to the two ends of a wire bundle, its indicator may get activated to confirm that there is no interruption in the continuity of the wire and everything's fine, or, if the indicator shows no action it would mean that there's a break in the continuity of the wire and needs attention. It may also be used to trace out faults in complicated electronic.
A node is a device connected to a network such as a computer or a game console. (Each device connected to a network is referred to as a node. A node can be a computer, printer, game console, or router.)
The device number connected on a Commodore 64 system relates to the number of controls connected. This determines how many players can interact with games simultaneously.
camera
If the Internet is slow when the device is NOT connected, then it is probably not related to that specific device.
a device driver
A spring device which maintains the spool of a directional control valve in position.
When checking continuity in a series circuit, you put your leads in series with the circuit or device being checked. You also make sure the circuit is deenergized and that it is open.