Important parts of an ac dynamo, Physics

1)The armature ABCD consists of a copper wire wound on cylindrical soft-iron core.The armature can be rotated horizontal axis perpendicular to magnetic field.

2)NS is permanent horseshoe magnet with concave surfaces at poles and provides stationary magnetic field.

3) The two leads of armature coil are connected to two slip-rings S1 and S2. These slip rings are fixed on a shaft which is contact with a soft-iron core. When shaft is rotated with the help of a mechanical energy source, the armature and slip rings rotate in the same axis.

4) B1, B2 are carbon brushes. They are always in contact with slip-rings S1 and S2. These brushes B1 and B2 are connected to external circuit along resistance or load R.

Working: When the armature rotates the magnetic flux linked with it charges and electric current is induced in the coil which flows through the load resistance R. Consider the armature to be in the vertical position and let it rotate in anticlockwise direction. The wires AB move downward and CD move upward and according to Flemings right hand rule the induced current flows from B to A and from D to C. Therefore during the first half rotation of the armature, the current flows in the coil in the direction BADC. During the second half rotation the current flows in the direction CDAB. The magnitude of the induced EMF and the current also change. In this way, alternating current is produced.

1853_Important parts of an AC dynamo.png

Posted Date: 8/28/2012 9:21:04 AM | Location : United States







Related Discussions:- Important parts of an ac dynamo, Assignment Help, Ask Question on Important parts of an ac dynamo, Get Answer, Expert's Help, Important parts of an ac dynamo Discussions

Write discussion on Important parts of an ac dynamo
Your posts are moderated
Related Questions
Figure  shows the magnetic circuit of a relay. When each of the air gaps are 1.5mm wide find the mmf required to produce a flux density of 0.75 T in the air gaps. Use the B-

Regard as two charged particles. At a given separation each one particle exerts a force of 12 N on the other. What force does every one exert on the other after someone moves the p


With Schematic diagram explain the working of a Michelson interferometer. Obtain the expression for radii of circular interference fringes. How shall you use it to measure waveleng

For this circuit which of the subsequent represents a correct way of connecting an ammeter to measure the current through resistor R2? Answer: An ammeter acts simila

Draw a picture of a moving source and the waves surrounding it according to what you observed in this experiment. How does the spacing of the wavefronts in front of the source comp

why it is not possible to charge one object by rubbing without charging another object by rubbing

why are vector and scalar necessary in our everyday activities?

The power distribute to a 15 watt light bulb in normal operation is 15 watts. In normal operation how greatly energy is delivered to such a bulb in an hour? Feedback:

Q. What are electromagnetic waves? As-per to Maxwell a speed up charge is a source of electromagnetic radiation. In an electromagnetic wave electric as well as magnetic field