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प्रश्न
The current induced in a closed circuit only if there is ______.
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उत्तर
The current induced in a closed circuit only if there is change in number of magnetic field lines linked with the circuit.
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संबंधित प्रश्न
Name the device which converts mechanical energy into electric energy.
What type of generator is used at Power Stations?
What is the function of brushes in an electric generator?
What determines the frequency of a.c. produced in a generator?
State one advantage of using a.c. over d.c.
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.

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.
Which labels identify the two slip rings?
Which is the standard form of the alternating EMF?
