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प्रश्न
Observe the following diagram and answer the questions.
- Explain the construction of the equipment shown in the figure.
- How is AC generated?
उत्तर
- An AC generator consists of a rotating rectangular coil ABCD placed between the two poles of a permanent magnet. The coil is attached to the two rings R1 and R2 at both ends. The two stationary conducting brushes B1 and B2 are maintained and pushed independently on the corresponding rings R1 and R2.
The coil inside the magnetic field can be rotated mechanically from the outside by turning the two internal rings R1 and R2, which are coupled to an axle. The galvanometer is linked to the two brushes' outer ends to display the direction of current flow in the specified external circuit. - According to Fleming's right-hand rule, the current is induced in these arms in the direction ABCD. After half rotation, arm CD moves down and arm AB moves up. As a result, each segment's current flow switches direction, resulting in net-induced current flowing in the direction of DCBA. As a result, the polarity of the current in each arm changes after every turn, producing an alternating current.
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संबंधित प्रश्न
Name some sources of direct current.
Which sources produce alternating current?
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each______.
The device used for producing electric current is called a ______.
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What is the major difference between the simple alternator and most practical alternators?
Complete the following sentence:
A generator with commutator produces ............... current.
State two ways in the which the current alternating current and direct current?
Draw the labelled diagram of an A.C. generator. With the help of this diagram, explain the construction and working of an A.C. generator.
Each one of the following changes will increase emf (or voltage) in a simple generator except:
(a) increasing the number of turns in the armature coil
(b) winding the coil on a soft iron armature
(c) increasing the size of the gap in which the armature turns
(d) increasing the speed of rotation
The frequency of alternating current (a.c.) supply in India is:
(a) 0 Hz
(b) 50 Hz
(c) 60 Hz
(d) 100 Hz
State whether the following statement are true of false:
A miniature circuit breaker (MCB) works on the heating effect of current.
What determines the frequency of a.c. produced in a generator?
Suggest two ways in an a.c. generator to produce a higher e.m.f.
Draw a neat labeled diagram of an A.C. generator
A device for producing electric current is ______.
Draw a neat diagram of an AC generator and explain its working.
To convert an AC generator into DC generator ____________.
An AC generator is provided with ______ slip rings that rotate with the coil.
