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प्रश्न
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.
उत्तर
- In an a.c generator, if the speed at which the coil rotates is doubled, the frequency is also doubled.
- The maximum output voltage is also doubled.
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संबंधित प्रश्न
State the principle of an electric generator.
What change should be made in an a.c. generator so that it may become a d.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
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.
Explain the difference:
AC generator and DC generator.
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.
Draw and label the diagram of an AC generator.
Draw a neat diagram of an AC generator and explain its working.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is withdrawn from inside the coil?
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?
