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प्रश्न
Name and state the principle of a simple a.c. generator. What is its use?
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उत्तर
An A.C. generator works on the principle of 'electromagnetic induction'.
Statement: Whenever a coil is rotated in a magnetic field, the magnetic flux linked with the coil changes, and therefore, an EMF is induced between the ends of the coil. Thus, a generator acts like a source of current if an external circuit containing load is connected between the ends of its coil.
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संबंधित प्रश्न
Name the phenomenon which is made use of in an electric generator.
Complete the following sentence:
A generator with commutator produces ............... current.
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
The current induced in a closed circuit only if there is ______.
Draw a labelled diagram of a simple a.c. generator.
Observe the figure and answer the following questions.
a) Identify the machine shown in figure.
b) Write a use of this machine.
c) How transformation of energy takes place in this machine.
Observe the figure and write the answers to the questions asked.
- The construction shown in the figure is of which device?
- Explain the principle on which this device works.
- Write any three uses of this device.
A device for producing electric current is ______.
Draw and label the diagram of an AC generator.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is withdrawn from inside the coil?
