Question

plzz explain the working of A.C nd D. C generator.class 10

Answer 1

A DC generator produces a steady output voltage that does not vary in voltage, or time. 

Actually, a DC generator could produce an AC output. It doesn't because the voltage is picked up from what is known as a commutator ring. 

There are several separate coils in the rotor of the generator.

 The coils are connected to contacts in the commutator ring and are spaced 180 degrees apart so that when they line up with the brushes that make contact with this ring, the connection is polarized as positive for one end of the coil and negative for the other end of the coil. 

Primary Uses of AC and DC Generators

AC and DC generators serve different purposes. Homes typically use AC generators to power small motors and common electrical appliances. These include vacuum cleaners, food mixers, juicers and electrical fixtures.
DC generators power very large electric motors — such as those needed for subway systems. Moreover, DC generators provide a reliable and efficient energy supply that can charge banks of batteries used for mobile and off-grid uses.



Design Differences

Both AC and DC generators produce currents via electromagnetic induction. In AC generators, the coil through which the current flows is fixed, and the magnet is moving. The magnet’s north and south poles cause the current to flow in opposite directions, producing an alternating current.
With DC generators, the coil through which the current flows rotates in a fixed field. The two ends of the coil attach to a commutator: different halves of a single, rotating split ring. Metal brushes connect these split rings to an external circuit. The commutator balances the charges leaving and returning to the generator, resulting in a current that does not change direction.

Answer 2

1. Ac generator ..
2. DC generator..
☺⭐I hope it help's u.....