Voltage
Voltage is a measure of how much electrical energy each electron in a battery has. It is the potential difference between two points in a circuit and is measured in volts.
When that circuit has no breaks. It is an endless path of current flow.
The impedance of an electric circuit is the measure of the opposition presented by a circuit when the current and voltage is applied.
The impedance of electric circuit refers to the measure of the opposition that a circuit presents to a current when a voltage is applied.
A voltmeter is a device to measure the voltage in a electric circuit, and must have be connected in parallel to it.
An ammeter is the instrument that measures electric current in a circuit. It is connected in series to the circuit to measure the flow of current through it.
The volt (symbol: V).
ammeter
An ammeter is the instrument used to measure current in an electric circuit. It is connected in series in the circuit and provides a reading of the amount of electric current flowing through it.
The force that causes electrons to move in an electric current is measured in volts, which is the unit of electrical potential difference. The flow of electrons is driven by this voltage, creating the current in the circuit.
The sun's rays do not have a specific voltage, as voltage is a measure of electric potential difference in an electrical circuit. However, solar energy can be harnessed by solar panels to generate electricity by converting sunlight into electrical energy.
Voltage is a measure of electric 'push'. When there's nothing to push (no circuit) it has no meaning, but that isn't to say it isn't there. Just the same as if you push a car. Take the car away and your push goes away. (or does it?)