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प्रश्न
Label the four parts of an electric motor
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उत्तर
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संबंधित प्रश्न
Draw figure ‘Electric motor’ and working
What is the Principle of an Electric motor?
Name any four appliances where electric motor is used.
What is the role of the split ring in an electric motor?
Explain the function of the following parts of an electric motor.
Armature
Explain the function of the following parts of an electric motor.
Split ring
State whether the following statement is true or false:
An electric motor converts mechanical energy into electrical energy.
Name the device which is used to reverse the direction of current in the coil of a motor?
What is the function of a commutator in 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?
Fill in the following blank with suitable words:
Fleming's Rule for the motor effect uses the .......... hand.
In a d.c. motor, why must the current to the coil be reversed twice during each rotation?
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:
both current and magnetic field were reversed simultaneously.
State what would happen to the direction of rotation of a motor if:
In what ways can a motor be made more powerful?
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
Which device is used to produce electricity? Describe with a neat diagram.
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.
Electric motor : converts electrical energy into mechanical energy : : Electric generator : _______
What is an electric motor?
Which of the following converts electrical energy into mechanical energy?
State whether true or false. If false, correct the statement.
A generator converts mechanical energy into electrical energy.
Direction of rotation of a coil in electric motor is determined by ____________.
In an electric motor, to make the coil rotating continuously in the same direction, the current is reversed in the coil after every half rotation by a device called ____________.
Commercial electric motors do not use ____________.
Material of the core of a strong magnet is ____________.
Draw a labelled circuit diagram of a simple electric motor and explain its working. In what way these simple electric motors are different from commercial motors?
