मराठी

Describe briefly, with the help of a labelled diagram, the basic elements of an A.C. generator. - Physics

Advertisements
Advertisements

प्रश्न

Describe briefly, with the help of a labelled diagram, the basic elements of an A.C. generator. 

टीपा लिहा

उत्तर

Basic elements of an A.C. generator

An A.C. generator consists of a rotor shaft on which a coil is mounted. A magnetic field is created around an armature coil with the help of permanent magnets.

The terminals of the coil are connected to two slip rings. Carbon brushes are attached to slip rings so as to make connection with an external circuit.

shaalaa.com
A.C. Generator
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2009-2010 (March) Delhi set 3

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?


Obtain the expression for the emf induced in the rotating coil of N turns each of cross-sectional area A, in the presence of a magnetic field `vecB` .


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


`20/pi^2`H inductor is connected to a capacitor of capacitance C. The value of C in order to impart maximum power at 50 Hz is


Elaborate the standard construction details of AC generator.


A hot wire ammeter reads 20 A in AC. circuit. The peak value of the current is ______


In an A.C. circuit, the peak value of voltage is 320 volt. Its effective voltage is ______


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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×