PHYS 1502Q Chapter Notes - Chapter 17: Magnetic Flux, Electric Flux, Angular Frequency
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It is possible for the magnetic flux to change in time without having a conductor being in motion. Sign is determined from energy conservation considerations. Emf itself creates a magnetic flux that opposes the change in flux that produced it. Defined by the boundaries of a loop. D = b d(lx) = b dt da = b dt. Just trust that it"s the same d b = a dt db = a dt. = loop rotates in a uniform b field t. = at time the loop makes an angle with the b field t t. D = b a = b. Whenever the magnetic flux changes, a emf is produced. Ways to change magnetic flux for a stationary loop. Change i b changes flux changes emf. Minus sign indicates direction of the current (cw or ccw) the emf would produce if the loop were a complete circuit d b dt opposes.
