The electromotive force of a battery or other electric power source is the value of the potential difference it maintains between its terminals in the absence of current. In a typical car battery, the chemical reaction maintains the potential difference at a maximum of 12 volts between the positive and negative terminals, so the emf is 12 V.
Electromotive Force is defined as follows: Electromotive Force is the electric potential generated by the battery or any electric source which allows the current flow to in the circuit. It is also called EMF which is the acronym for Electromotive Force. As the name suggests EMF is not any kind of force but rather it is the potential differences.
The basic difference between Electromotive Force and Potential Difference is discussed in the table below, The work done on a unit charge in the circuit is called the Electromotive Force. The energy required by the battery to move the charge in the circuit excluding the battery itself is called Potential difference.
A battery delivers maximum power to a circuit when the load resistance is equal to the internal resistance of the battery. When a charge passes through the power supply, it gains electrical energy. The power supply is said to have an electromotive force, or emf. Electromotive force is measured in volts. Electromotive force is not a force.
Answer: As we know electromotive force is the voltage thus, the SI unit for measuring the electromotive force is Volt. Q6: What is the Potential Difference? Answer: The energy required by one unit charge form moving postive terminal of the battery to the negative termial of the battery is called the potential difference of the battery.
The power supply is said to have an electromotive force, or emf. Electromotive force is measured in volts. Electromotive force is not a force. Instead, it is the energy gained by the charge that comes from the chemical energy of the battery. In equation form, B. Internal Resistance