Why does the earth’s magnetic field is believed to originate? A. By a separation of north and south monopoles due to currents within the earth B. With electric currents that are somehow generated in the earth’s core C. From the process that are not understood D. From a giant iron and cobalt bar magnet inside the earth

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A: Given : Current →I=4.5 A Magnetic field →B=0.250 T

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A: Last option

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A: Magnetic field due to straight wire is  B=μ0I2πr =4π×10-7 Hm400 A2π5 m =1.6×10-5 T =0.016 mT

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Q: a. Draw the earth magnetic field and show where the intensity is the strongest and weakest. b. Show…

A: This question can be solved by using the various concepts of physics.

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Bar Magnet

In physics, magnetism is a phenomenon exhibited by a magnetic substance that exerts either attractive or repulsive force. A bar magnet is either a rectangular or round and hollow fit comprised of ferromagnetic materials and has a fanciful attractive field surrounded by it.