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प्रश्न
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.
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उत्तर
a) The instrument shown in figure is generator.
b) This machine is used to generate electricity.
c) The generator generates electricity through following transformations :
Mechanical Energy → Electrical Energy
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संबंधित प्रश्न
State the principle of an electric generator.
State whether the following statement is true or false.
An electric motor converts mechanical energy into electrical energy.
Name the device which converts mechanical energy into electric energy.
What type of generator is used at Power Stations?
What is the major difference between the simple alternator and most practical alternators?
Why are Thermal Power Stations usually located near a river?
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.
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
What determines the frequency of a.c. produced in a generator?
Draw a labelled diagram of a simple a.c. generator.
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 construction and working of the following. Draw a neat diagram and label it.
Electric Generator (AC)
State change that you would make to convert an A.C. generator into a D.C. generator. Illustrate the change by a diagram.
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 coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is withdrawn from inside the coil?
Observe the following diagram and answer the questions.
- Explain the construction of the equipment shown in the figure.
- How is AC generated?
