Question

write working of dc generator​

Answer 1

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The answer is in the attachment...

Answer 2

the coil (the "purple, green" conductor in the magnetic field), after two semicircular sliding rings contact with the AB'( brush), and then pass through the wire, the bulb forms a closed loop; when the coil is running counterclockwise, The amount of flux passing through the coil is changing, Or: the coil cuts the magnetic field (magnetic line of force) so that the loop produces a induced electromotive force (right-hand rule). The reason for the DC output is that the two semicircular sliders alternately touch the brush. If the bulb is connected directly to the slider ring and rotates with the coil instead of the brush, the current flowing through the bulb is alternating current, which is, of course, impractical, so the alternator uses two complete sliding rings.

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