what is the difference between emf and voltage
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EMF is not a force, it's the potencial difference of a source when no current is flowing, units of EMF are volts.
When current flows, there's a resistance to its flow called internal resistance r, which is the internal resistance to the current flow within the source itself.
If I is the current flowing the terminal voltage is V=EMF-Ir where I is the current flow at the time of the measurement
Keep in mind the EMF differs from the voltage output of the source when current flows.
For instance, in a battery, terminal voltage is lower than EMF when current is flowing, and will be lower still as the battery is depleted. Nevertheless, EMF in that same battery, when current is not flowing, will be the same, regardless if the battery is fully loaded or very depleted.
The electromotive force (emf) is the potential difference of a source when no current is flowing. Terminal voltage is the voltage output of a device is measured across its terminals. Terminal voltage is calculated by V = emf – Ir.
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When current flows, there's a resistance to its flow called internal resistance r, which is the internal resistance to the current flow within the source itself.
If I is the current flowing the terminal voltage is V=EMF-Ir where I is the current flow at the time of the measurement
Keep in mind the EMF differs from the voltage output of the source when current flows.
For instance, in a battery, terminal voltage is lower than EMF when current is flowing, and will be lower still as the battery is depleted. Nevertheless, EMF in that same battery, when current is not flowing, will be the same, regardless if the battery is fully loaded or very depleted.
The electromotive force (emf) is the potential difference of a source when no current is flowing. Terminal voltage is the voltage output of a device is measured across its terminals. Terminal voltage is calculated by V = emf – Ir.
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Voltage is another word for electrical potential difference. Potential difference between point A and B is also known as the voltage between point A and point B. It is also defined as the amount work to be done to move a unit charge (+1 Coulomb) from B to A. Voltage is measured in the unit Volts (V). Voltmeter is the equipment used to measure voltage. A battery provides a voltage between its two ends (electrodes) and its positive side has a higher potential and negative has a lower potential.
In a circuit, current flows from the higher potential to lower potential. When it goes through a resister, a voltage between two ends can be observed. This is called as a ‘voltage drop’. Although the voltage is always about two points sometimes people ask for a voltage of a point. This is about the voltage between that particular point and a reference point. This reference point is usually ‘grounded’ and potential of it is considered as 0V
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PLRASE MARK BRAINLIEST
Voltage is another word for electrical potential difference. Potential difference between point A and B is also known as the voltage between point A and point B. It is also defined as the amount work to be done to move a unit charge (+1 Coulomb) from B to A. Voltage is measured in the unit Volts (V). Voltmeter is the equipment used to measure voltage. A battery provides a voltage between its two ends (electrodes) and its positive side has a higher potential and negative has a lower potential.
In a circuit, current flows from the higher potential to lower potential. When it goes through a resister, a voltage between two ends can be observed. This is called as a ‘voltage drop’. Although the voltage is always about two points sometimes people ask for a voltage of a point. This is about the voltage between that particular point and a reference point. This reference point is usually ‘grounded’ and potential of it is considered as 0V
HOPE IT HELPS YOU
PLRASE MARK BRAINLIEST
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