Question

Difference between alternating and direct current.
Also b/w AC and DC generator

Answer 1

AC Generator:-

⇒ AC generator is a mechanical device which converts mechanical energy into AC electrical power.

⇒ In an AC generator, the electrical current reverses direction periodically.

⇒ In an AC generator, the coil through which the current flows is fixed while the magnet moves. The construction is simple and costs are less.

⇒ AC generator does not have commutators.

⇒ AC generators have slip-rings.

DC Current:-

⇒ DC generator is a mechanical device which converts mechanical energy into DC electrical power.

⇒ In a DC generator, the electrical current flows only in one direction.

⇒ In a DC generator, the coil through which the current flows rotates in a fixed field. The overall design is very simple but construction is complex due commutators and slip rings.

⇒ DC generators have commutators to make the current flow in one direction only.

⇒ DC generators have split-ring commutators.