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प्रश्न
State true or false:
The frequency of AC is 50 Hz.
पर्याय
True
False
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उत्तर
The frequency of AC is 50 Hz. - True
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संबंधित प्रश्न
State the principle of an electric generator.
The device used for producing electric current is called a ______.
Name the device which converts mechanical energy into electric energy.
What type of generator is used at Power Stations?
What change should be made in an a.c. generator so that it may become a d.c. generator?
What is the major difference between the simple alternator and most practical alternators?
Why are Thermal Power Stations usually located near a river?
Explain the principle of an electric 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
The frequency of alternating current (a.c.) supply in India is:
(a) 0 Hz
(b) 50 Hz
(c) 60 Hz
(d) 100 Hz
State whether the following statement are true of false:
A wire with a green insulation is usually the live wire.
The current induced in a closed circuit only if there is ______.
Explain the difference:
AC generator and DC generator.
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 device for producing electric current is ______.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?
State one factor that affects the magnitude of induced current in an AC generator.
