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प्रश्न
Electric motor : converts electrical energy into mechanical energy : : Electric generator : _______
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उत्तर
Electric motor : converts electrical energy into mechanical energy : : Electric generator : converts mechanical energy into electrical energy
APPEARS IN
संबंधित प्रश्न
Draw figure ‘Electric motor’ and working
Name any four appliances where electric motor is used.
Name some devices in which electric motors are used
Explain the function of the following parts of an electric motor.
Armature
Explain the function of the following parts of an electric motor.
Brushes
Explain the function of the following parts of an electric motor.
Split ring
Electric motor works on the magnetic effect of electric current.
A motor converts one form of energy into another. Name the two forms.
State whether the following statement is true or false:
An electric motor converts mechanical energy into electrical energy.
What is the other name of the split ring used in an electric motor?
What is the function of a commutator in an electric motor made ?
Of what substance is the core of the coil of an electric motor made?
In an electric motor, which of the following remains fixed and which rotates with the coil?
Commutator ; Brush
What is the role of the spilt ring in an electric motor?
What is the principle of an electric motor?
State what would happen to the direction of rotation of a motor if:
the current were reversed
State what would happen to the direction of rotation of a motor if:
In what ways can a motor be made more powerful?
What is an electric motor? With the help of a labelled diagram, describe the working of a simple electric motor
What are the special features of commercial electric motors?
In an electric motor, the direction of current in the coil changes once in each:
two rotations
one rotation
half rotation
one-four rotation
Tell the odd one out. Give a proper explanation.
Study the following principle and answer the question.
A force is excreted on the current carrying conductor. The direction of this force depends on both the direction of the current and the direction of the magnetic field. This force is maximum when the direction of current is perpendicular to the direction of the magnetic field.
a) By which law we can determine the direction of force excreted on the current carrying conductor.
b) In which electrical equipment this principle is used.
c) Draw a diagram representing construction of this equipment.
d) Write the working of this equipment in brief.
Name some of the devices in which electric motor are used.
Right or wrong sentence.
Electro chemicals are devices that convert electrical energy into mechanical energy.
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.
An electric motor converts ______.
State whether true or false. If false, correct the statement.
The speed of rotation of an electric motor can be increased by decreasing the area of the coil.
List the main parts of an electric motor.
Commercial electric motors do not use ____________.
Material of the core of a strong magnet is ____________.
Draw an appropriate schematic diagram showing common domestic circuits and discuss the importance of fuse. Why is it that a burnt out fuse should be replaced by another fuse of identical rating?
The most suitable material for making permanent magnets is ______.
