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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?
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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
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each______.
Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?
Name the device which converts mechanical energy into electric energy.
Complete the following sentence:
A generator with commutator produces ............... 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.
An electric generator converts:
(a) electrical energy into mechanical energy.
(b) mechanical energy into heat energy.
(c) electrical energy into chemical energy.
(d) mechanical energy into electrical energy.
A d.c. generator is based on the principle of:
(a) electrochemical induction
(b) electromagnetic induction
(c) magnetic effect of current
(d) heating effect of current
State whether the following statement are true of false:
A wire with a green insulation is usually the live wire.
Name and state the principle of a simple a.c. generator. What is its use?
In an a.c. generator the speed at which the coil rotates is doubled. How would this affect
- the frequency of output voltage,
- the maximum output voltage is doubled.
What energy conversion does take place in a generator when it is in use?
State one advantage of using a.c. over d.c.
Explain the difference:
AC generator and DC generator.
Explain the construction and working of an electric generator (AC) with the help of a neat diagram.
State true or false:
The frequency of AC is 50 Hz.
A device for producing electric current is ______.
Draw and label the diagram of an AC generator.
Draw a neat diagram of an AC generator and explain its working.
To convert an AC generator into DC generator ____________.
