Created by StemPy LabA square wire loop of side and resistance lies in a uniform magnetic field of , perpendicular to its plane. It is pulled out of the field at a steady speed of , in the direction of one of its sides. While one side is still inside the field and the opposite side is already outside, the power needed to keep pulling it at this speed is
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← A cyclotron accelerates protons in a magnetic field of 1.0 T. The protons leave when their circle reaches a radius of 50 cm. Take the proton's mass as 1.67 × 10⁻²⁷ kg and its charge as 1.6 × 10⁻¹⁹ C. The frequency of the alternating voltage needed, and the kinetic energy of the protons as they leave, are closest toA current rises steadily from 0 to I₀ during each period and then drops back to zero at once, again and again, as shown in the graph (a sawtooth wave). Its average value and its root-mean-square (rms) value over a period are →
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