Sounds more like you're trying to measure resistance...
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.
To measure Voltage which is the force pushing current :)
voltmeter
The Voltmeter is used to measure the electrical potential difference between two points... so it's no use to connect it in Series , because the electrical potential difference between two points at the same line is zero ==> the readings will always be zero. The Ammeter is used to measure the electric current in a circuit... so it's no use to connect it in Parallel , because you want to know the current flowing in this wire. note the internal Resistance of the Ammeter is very little and very high for the Voltmeter --> so they will not affect the circuit.
An ammeter is used to measure the current through a circuit and thus it must be in series with that load. Also, it's resistance is so low that it cannot be connected in parallel since it will result in a short circuit. A Voltmeter is intended to measure the voltage across a circuit and thus it must be connected in parallel. It has a very high resistance such that connecting it in series with a circuit will lender the circuit useless or inoperative.
A voltmeter is used to measure the voltage difference between two points in a circuit. It helps to determine the electrical potential difference and monitor the health of the circuit components.
In a series circuit, the voltmeter will measure the total voltage across all components. In a parallel circuit, the voltmeter will measure the voltage across each individual branch or component. The reading on the voltmeter will vary based on the circuit configuration.
by voltmeter
To measure voltage in a parallel circuit, connect the voltmeter's probes across the component for which you want to measure the voltage. Ensure the positive probe of the voltmeter is connected to the positive side of the component and the negative probe to the negative side. The voltmeter will then display the voltage across that component.
A voltmeter is a device to measure the voltage in a electric circuit, and must have be connected in parallel to it.
To measure the total emf simply connect the battery and voltmeter with the right terminals , but to measure the terminal potential difference which is less than the emf the voltmeter is connected in parallel with the battery
A Voltmeter.
The purpose of a voltmeter is to measure the voltage difference between two points in an electric circuit. It helps in determining if the circuit is functioning correctly and can also be used to troubleshoot issues related to voltage levels.
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.
Place a voltmeter across the two points in the circuit you want to measure, and measure it. Be sure to know the expected voltage so that you can take appropriate safety precautions, and know the impedance of the circuit so that you can choose a voltmeter with a high enough internal impedance that it will not significantly affect the circuit.
Connect a power source to the resistor (+ve terminal to one side of the resistor and -ve terminal to the other) then connect a voltmeter in parallel with the resistor. The reading on the voltmeter will provide a measure of the potential difference across the resistor (ie: the voltage drop across it).
A volt meter is use to measure the voltage of the circuit.