No. A voltmeter measures potential difference (voltage). To measure power, a wattmeter is required. On the other hand, for a d.c. circuit only, you could use a voltmeter and an ammeter, and multiply their readings in order to calculate the power of a load.
A watt meter will measure active power, not reactive power.
The Ammeter XD
All voltage reading are usually read with a volt meter. This volt meter can be a hand held unit like electricians use.
In a transformer, 40 VA refers to the apparent power rating of the transformer. VA stands for volt-ampere, which is a unit used to measure apparent power in an electrical circuit. A transformer with a rating of 40 VA can handle a maximum apparent power of 40 volt-amperes, which is the product of the voltage and current it can handle. This rating is important for determining the capacity and suitability of the transformer for specific applications.
If you use this formula W = Amps x Volts you will not need any tools. Using equipment nameplates will give you both values. If nameplates are inaccessible then you need a volt meter and an amp meter to obtain these values.
first we connect the 3 volt meter in three loads then we measure the voltage and find the resistance of the loads then put the formula p=v/r so in this method we get the power by using 3 volt meter ....(prashant)
you put a volt meter on it
A volt meter will do the job.
A volt meter is use to measure the voltage of the circuit.
A 3-phase meter measures the sum of the power in the three phases, so if power is drawn on one phase only it will still be correctly measured.
Volt-amperage, or apparent power, is measured in volt-amperes (VA) and can be calculated by multiplying the voltage (in volts) by the current (in amperes) in an electrical circuit. To measure it, you can use a multimeter or a clamp meter to determine the voltage and current, and then apply the formula: VA = Voltage (V) × Current (A). For AC circuits, it's important to consider the power factor if calculating real power in watts.
test light or volt meter
A volt meter is used to detect the presence of voltage, and it also measure the amount of voltage (electrical pressure) in a circuit.
A milli voltmeter is suitable for measuring voltage/potential difference in milli volts, thus they measure smaller voltages. A regular voltmeter is used to measure comparatively larger voltages.
To measure electrical voltage accurately using a volt meter, first ensure the meter is set to the appropriate voltage range. Connect the red probe to the positive terminal and the black probe to the negative terminal of the circuit. Read the voltage displayed on the meter and record the measurement.
Digital Volt Meter (DMM)
it is used to measure very high voltages which can not be measured with volt meter.