What does an EMF of 12v mean?

A battery has an EMF of 12V ; it means that the battery supplies 12 joules of energy to each coulomb of charge. The charge is travel from the positive terminal to negative terminal through an external circuit; it gives a whole of the energy originally supplied by the battery.

What is meant by an EMF of 6V?

Such a force is referred to as an electromotive force (EMF). It is measured in volts. The abbreviation for volts when stating a voltage value is V. e.g. an EMF of 6 volt is indicated by 6V. A battery, power supply or generator can be used as a source of EMF.

What is meant by EMF of a battery?

Electromotive force (EMF) is equal to the terminal potential difference when no current flows. EMF and terminal potential difference (V) are both measured in volts, however they are not the same thing. EMF (ϵ) is the amount of energy (E) provided by the battery to each coulomb of charge (Q) passing through.

What do you mean by EMF 1.5 volt?

Answer: the EMF of a cell is 1.5 V it means that. it can supply maximum 1.5 volt of current in an open circuit and if the circuit is closed then it will act as 1.5 volt potential difference.

What is voltage in EMF?

EMF or electromotive force is the potential difference generated by one or more cells or a changing magnetic field in a solar cell, and voltage is the potential difference measured at any two points in the magnetic field. The SI unit and voltage of EMF are the same (volt).

How do I calculate EMF?


Quote from video:

When a resistance of 2 ohm is connected across the terminals of a cell?

When a resistance of 2 ohms is connected across the terminals of a cell,the current is 0.5 A. When the resistance is increased to 5 ohms,the current becomes 0.25 A.

How do you find the potential difference across the terminals of the battery?

The potential difference across the terminals of a battery is 8.4V when there is a current of 1.5V in the battery from the negative to the positive terminal. When the current is 3.5A in the reverse direction, the potential difference becomes 9.4V.

What is the formula of terminal voltage?

V=emf−Ir, where r is the internal resistance and I is the current flowing at the time of the measurement. I is positive if current flows away from the positive terminal, as shown in Figure 2.

What is the potential difference of a battery?

The electric potential difference, 𝑉 , between the two terminals of a battery is given by 𝑉 = 𝑊 𝑄 , where 𝑊 = the amount of work done to separate opposite charges in the battery, and 𝑄 = the amount of charge separated. Electric potential difference is measured in units of volts, V.