Advertisements
Advertisements
प्रश्न
List out the advantages of stationary armature-rotating field system of AC generator.
उत्तर
- The current is drawn directly from fixed terminals on the stator without the use of brush contacts.
- The insulation of stationary armature winding is easier.
- The number of sliding contacts (slip rings) is reduced. Moreover, the sliding contacts are used for low-voltage DC Source.
- Armature windings can be constructed more rigidly to prevent deformation due to any mechanical stress.
APPEARS IN
संबंधित प्रश्न
Suppose the loop is stationary but the current feeding the electromagnet that produces the magnetic field is gradually reduced so that the field decreases from its initial value of 0.3 T at the rate of 0.02 T s−1. If the cut is joined and the loop has a resistance of 1.6 Ω how much power is dissipated by the loop as heat? What is the source of this power?
State the principle of an ac generator and explain its working with the help of a labelled diagram. Obtain the expression for the emf induced in a coil. having N turns each of cross-sectional area A, rotating with a constant angular speed 'ω' in a magnetic field `vecB` directed perpendicular to the axis of rotation.
State A.C. generator underlying principle?
The instantaneous values of alternating current and voltage in a circuit are
i = `1/sqrt2` sin 100π A and
v = `1/sqrt2 sin (100 pi"t" + pi/3)"V"`.
The average power in watts consumed in the circuit is
Give the principle of AC generator.
When the plane of the armature of a generator is parallel to the field. in which it is rotating ______.
The north pole of a bar magnet is rapidly introduced into a solenoid at one end (say A). Which of the following statements correctly depicts the phenomenon taking place?
In an A.C circuit, the current
The coil of an ac generator consists of 100 turns of wire, each of area 0.5 m2. The resistance of the wire is 100 Ω. The coil is rotating in a magnetic field of 0.8 T perpendicular to its axis of rotation, at a constant angular speed of 60 radians per second. Calculate the maximum emf generated and power dissipated in the coil.
Draw a schematic diagram of an AC generator.
