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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.
Please re define "If an insulator with a lamp"
Usually a circuit is connected to a power source, which could be a battery or an outlet. When this happens current flows through the circuit. The power supply raises electrical charges through the required potential difference, and then in the circuit the charges flow down the potential gradient giving up their energy.
There's no reason to expect that the intensity of light must necessarily change when it enters a different medium.
short circuit
oppen circuit
No change in supply voltage as additional resistance is connected in parallel circuit.
The other components are still connected to the circuit
The other bulb remain to glow with same intensity.
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 current flowing in will be low
nothings because they is no wire connected to the circuit so no current can flow through
Please re define "If an insulator with a lamp"
The lamps will get dimmer. In a parallel circuit, voltage is constant. Whereas, in a series circuit, amps are constant.
A voltage error circuit is called an error amplifier and happens when there are discrepancies between the voltage output and the reference voltage. A current error circuit happens when there is a disruption of flow in an ammeter.
To close a circuit in electrical terminology is to close any open devices that are in series with a connected load. Once this happens the current will flow through the load and the load is then termed as energised. In the case of a motor circuit the motor will operate. In the case of a lighting circuit the lamps in the circuit will energise and light the area in which they are installed.
If you don't change the voltage between the ends of the circuit,then higher resistance in the circuit means lower current (amps).