Physics, 17.02.2021 01:00 shelby8385
Which statements correctly describe electromagnetism? Select all that apply. A. An electric force can be attractive or repulsive, but a magnetic force is always attractive. An electric force can be attractive or repulsive, but a magnetic force is always attractive. B. An increase in charge will cause the electric force between two particles to increase. An increase in charge will cause the electric force between two particles to increase. C. An increase in distance between two charges will cause the electric force between them to increase. An increase in distance between two charges will cause the electric force between them to increase. D. If a charge is held at rest in a magnetic field, and then released, it will begin to move perpendicular to the magnetic field. If a charge is held at rest in a magnetic field, and then released, it will begin to move perpendicular to the magnetic field. E. An electric force acts between protons and electrons but not between protons and neutrons. An electric force acts between protons and electrons but not between protons and neutrons.
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Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.
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Which statements correctly describe electromagnetism? Select all that apply. A. An electric force ca...
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