As an electrician, the circuit would be tested for voltage before starting any work. All people that deal with electricity for a living have testers. For people that are weekend electricians it should be suggested that they also buy one for their own protection.
An electrical circuit used to measure an unknown electrical resistance is called a Wheatstone bridge. It is called a bridge because it balances two legs of a bridge circuit.
Wheatstone bridge is used to calculate the resistance of unknown resistor in the circuit.
The voltmeter is connected parallel to the circuit in order to measure the voltage drop across that circuit or sub-circuit. If you were to connect the volmeter series to the circuit, since it is a high impedance device, it would represent an effective open-circuit condition. You would see the voltage available to the circuit, but the circuit would not receive its intended current and it would not function. Contrast this with the ammeter, which you do place series to the circuit in order to measure the current flow through the circuit.
A parallel circuit
the circuit would not be complete. the lightbulb would not light or the buzzer would not buzz
By broke, do you mean it has no money?...Or do you mean it is defective(Broken!)? If the latter, there is no way of answering the question, because the nature of the circuit topology is unknown, defect is unknown, and the test instrument is unknown.
A rheostat can be used to vary the resistance in a circuit until a balance condition is reached, allowing for the determination of the unknown resistor value through adjusting the resistance of the rheostat until the circuit is balanced. This process is often used in bridge circuits for precise resistance measurements.
A lighting circuit would be a parallel circuit.
An electrical circuit used to measure an unknown electrical resistance is called a Wheatstone bridge. It is called a bridge because it balances two legs of a bridge circuit.
It they are unknown how would we know if they are unknown
if they are unknown how would be know about them?
Wheatstone bridge is used to calculate the resistance of unknown resistor in the circuit.
a home run is translated 'circuit' or 'coup de circuit' in Canadian French. In France the game is unknown and the few French who know about baseball rules would probably use the American terms like 'home run'.
You would have to specify the circuit.
Nope... if the circuit has a gap in it - the path of electrons is interrupted, and that would stop the circuit from working.
if they were famous they would not be unknown
The voltmeter is connected parallel to the circuit in order to measure the voltage drop across that circuit or sub-circuit. If you were to connect the volmeter series to the circuit, since it is a high impedance device, it would represent an effective open-circuit condition. You would see the voltage available to the circuit, but the circuit would not receive its intended current and it would not function. Contrast this with the ammeter, which you do place series to the circuit in order to measure the current flow through the circuit.