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प्रश्न
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.
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उत्तर
- The figure shows the construction of an electric generator.
- Principle of electric generator: Electric generator works on the principle of electromagnetic induction. When the coil of the electric generator rotates in a magnetic field, the magnetic field induces a current in this coil. This induced current then flows into the circuit connected to the coil.
- Uses of electric generator are-
- Providing backup energy for emergencies.
- Powering construction sites.
- Powering nuclear reactor plants.
- Providing backup for hospitals and other office buildings
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संबंधित प्रश्न
Name some sources of direct current.
Which sources produce alternating current?
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each______.
The essential difference between an AC generator and a DC generator is that
State whether the following statement is true or false.
An electric motor converts mechanical energy into electrical energy.
What is the major difference between the simple alternator and most practical alternators?
Complete the following sentence:
A generator with commutator produces ............... current.
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?
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)
Draw a neat labeled diagram of an A.C. generator
A flat coil of wire rotates at a constant speed about an axis perpendicular to a uniform magnetic field. Draw a graph to show how the induced e.m.f. varies relative to the positions of the coil during its one complete rotation. At what position of the coil, the e.m.f. has the maximum value?
The part of the AC generator that passes the current from the armature coil to the external circuit is ______.
Draw a neat diagram of an AC generator and explain its working.
To convert an AC generator into DC generator ____________.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?
An AC generator is provided with ______ slip rings that rotate with the coil.
State one factor that affects the magnitude of induced current in an AC generator.
