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प्रश्न
Identify the figure and explain its use.
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उत्तर
The figure shows the construction of an electric DC generator.
Instead of a light bulb, an ammeter is displayed here.
Working: An external machine rotates the axle. Electromagnetic induction causes the generator's armature coil to produce an electric potential difference when it rotates in a magnetic field. This generates a current, as indicated by a galvanometer or the lightbulb's glow. The coil's sense of rotation determines the current's direction.
One brush in a DC generator is always in contact with the coil's upward-moving arm, while the other brush is in contact with the coil's downward-moving arm within the magnetic field. As a result, the circuit's current always flows in the same direction as long as the coil rotates in the magnetic field.
संबंधित प्रश्न
If the current values periodically from zero to a maximum value, back to zero, and then reverses its direction, the current is ____________.
The main advantage of A.C power transmission over D.C power transmission over’ long distance is ____________.
Which device produces the electric current?
The best material to make permanent magnets is ____________.
An electric generator actually acts as ____________.
To convert an AC generator into DC generator
Name four appliances where in an electric motor, a rotating device that converts electrical energy to mechanical energy, is used as an important component. In what respect motors are different from generators?
What is the role of the two conducting stationary brushes in a simple electric motor?
An electric generator converts ______.
Match the following:
| 1. | Electric generator | a. | Electromagnetic induction |
| 2. | Dynamo | b. | Fleming’s left-hand rule |
| 3. | Magnetic field lines | c. | Slip rings |
| 4. | Electric motor | d. | North to south |
An electric generator works on the principle of electromagnetic induction.
Observe the following diagram and answer the questions given below:
- Identify the above diagram. (1)
- Write the principle on which the above appliance works. (1)
- Write the working of the above appliance. (2)
- Write the use of the above appliance. (1)
What is an electric fuse?
How is electric fuse connected in a circuit?
