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Anveshan
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A cell supplies a current of 2 Ampere, when it is connected to 5 ohm resistance and supply a current of 1.2 Ampere. If it is connected to resistance of 9 ohm, find EMF(electro motive force) and Internal Resistance
Anveshan said:A cell supplies a current of 2 Ampere, when it is connected to 5 ohm resistance and supplies a current of 1.2 Ampere if it is connected to resistance of 9 ohm. Find EMF(electro motive force) and Internal Resistance
EMF stands for electromotive force, and it is the measure of the energy that is generated by a source, such as a battery or a generator. It is measured in volts (V).
EMF and voltage are often used interchangeably, but they are not exactly the same. EMF is the energy generated by a source, while voltage is the potential difference between two points in a circuit. EMF is the energy that is available to do work, while voltage is the force that drives the current in a circuit.
Internal resistance is the resistance that is inherent in a source, such as a battery. It is caused by the materials and construction of the source and can affect the flow of current in a circuit. Internal resistance is measured in ohms (Ω).
Internal resistance can cause a decrease in the EMF of a source. This is because as current flows through the source, some of the energy is lost due to the resistance. This means that the actual voltage available to do work in the circuit is lower than the EMF of the source.
Internal resistance is inherent in a source and cannot be completely eliminated, but it can be reduced. Using materials with lower resistance and improving the construction of the source can help to decrease the internal resistance. Additionally, using larger and thicker wires in the circuit can also help to reduce the effects of internal resistance.