Answer :
The EMF of the battery is 57.8 V and its internal resistance is 2.89 Ω.
EMF = V + Ir
EMF = (V1I2 - V2I1) / (I2 - I1)
where V1 and I1 are the voltage and current at one point, and V2 and I2 are the voltage and current at another point.
r = (V1 - EMF) / I1
Using the values given in the problem, we get:
EMF = (46.0 V * 2.56 A - 37.1 V * 7.12 A) / (2.56 A - 7.12 A) = 57.8 V
r = (37.1 V - 57.8 V) / 7.12 A = 2.89 Ω
EMF stands for electromagnetic field. It refers to the physical field produced by electrically charged objects in motion, such as electrically charged particles, electromagnetic radiation, or magnetic fields. EMF is a fundamental aspect of nature and is present all around us, from the Earth's magnetic field to the radio waves used for communication.
EMF can have both positive and negative effects on living organisms, depending on the frequency and intensity of the field. For example, EMF is used in medical imaging techniques such as MRI machines, but excessive exposure to EMF from sources such as high-voltage power lines or cell phones has been associated with health risks. The study of EMF and its effects on living organisms is an active area of research, and scientists continue to explore its potential applications and risks.
To learn more about EMF visit here:
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