What is the energy density at the center of a circular loop of wire carrying a 23.0 A current if the radius of the loop is 25.0 cm?

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Q: A copper wire with a square cross-section (side length 5.00 µm) is next to an iron wire with a…

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Q: The figure shows wire 1 in cross section; the wire is long and straight, carries a current of 4.06…

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Q: The Emf is equal to ξ=46.1V, R=36.4Ω. What is the current flowing through R1 (in A)?

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Q: 21 - а) 0.2 В) 3.8х10-6

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A: Distance, d = 9 cm Force per unit length, F = 10-4 N/m

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Q: U1 25V R1 50 R6 39 www 250 R2 www 375 www R5 R3 150 U2 2.5 ww R4 27.5 www

A: Determine the net resistance in series. Determine the net voltage.

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A: I1 = 4.06 mA = 4.06 × 10- 3 A I2 = 6.90 mA = 6.90 × 10- 3 A d1 = 2.40 cm = 2.40 × 10- 2 m d2 = 5.32…

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Q: R= 6.02 1.20 m,

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A: (a) Write the formula for the magnetic field due to a current flowing conductor.

Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.