You measure voltage using a voltmeter which involves measuring the electrical potential difference between 2 points in an electrical circuit.
there isn't one.
measure the voltage,amphere resestance
"Open circuit voltage" is a characteristic of a battery or power supply. You measure it exactly as the term suggests ... disconnect any load from it (or open the ON/OFF switch), and measure the voltage across the terminals of the battery or power supply while it's not supplying current to anything.
only earthing can not be measure. Anyone can only measures the voltage and the current with respect to the earthing .Thus it is impossible to measure the earthing.
Voltage source
a voltmeter is used to measure voltage
Any one using a voltage test instrument can measure charge differential voltage.
Many can measure both - Vrms (AC) or DC voltage.
The unit of measure for voltage is volt. Ohm measures resistance.
You measure the peak to peak voltage and divide by 2.
A voltmeter would measure the voltage. If you measure the voltage drop over a known low resistance you get a kinda-sorta idea of the power available.
You don't. You need test equipment to measure voltage.
A voltmeter measures voltage in volts.
An ammeter measures amperage not voltage.
Decrease or reduction of voltage along the wire is called voltage drop. It is measure through wire and load resistance difference.
A voltage test meter is used to measure voltage potentials in a circuit.
The SI unit of voltage is the Volt, which is a derived unit equivalent to a Joule/Coulomb.