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प्रश्न
What is an electric motor?
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उत्तर
Electric motor is a device which converts electrical energy into mechanical energy.
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संबंधित प्रश्न
Name any four appliances where electric motor is used.
Name some devices in which electric motors are used
Explain the construction and working of an electric motor.
Explain the function of the following parts of an electric motor.
Armature
Electric motor works on the magnetic effect of electric current.
A motor converts one form of energy into another. Name the two forms.
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 ?
Of what substance are the brushes of 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
Fill in the following blank with suitable words:
Fleming's Rule for the motor effect uses the .......... hand.
What is the principle of an electric motor?
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:
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?
An electric motor is a device which transforms:
mechanical energy to electrical
heat energy to electrical energy
electrical energy to heat energy only
electrical energy to mechanical energy
Tell the odd one out. Give proper explanation.
Loud speaker, Microphone, Electric motor, Magnet.
Which device is used to produce electricity? Describe with a neat diagram.
Name some of the devices in which electric motor are used.
Electric motors 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.
A generator converts mechanical energy into electrical energy.
An electric motor is a device which transforms ____________.
Direction of rotation of a coil in electric motor is determined by ____________.
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?
