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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 electric motor.
- Principle of an electric motor: Electric motor works on the principle that a current-carrying conductor placed in a magnetic field experiences a force.
- Electric motor is used in fans, washing machines, fax machines etc.
APPEARS IN
संबंधित प्रश्न
Draw figure ‘Electric motor’ and working
Name any four appliances where electric motor is used.
What is the role of the split ring in an electric motor?
State whether the following statement is true or false.
An electric motor converts mechanical energy into electrical energy.
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
Label the four parts of an electric motor
Electric motor works on the magnetic effect of electric current.
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 other name of the split ring used in an electric motor?
Of what substance are the brushes 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.
Fill in the following blank with suitable words:
A motor contains a kind of switch called a .......... which reverses the current every half .......... .
What is the principle of an electric motor?
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
Name some of the devices in which electric motor are used.
Draw a labelled diagram of an electric motor.
Electric motor : converts electrical energy into mechanical energy : : Electric generator : _______
In which electric motor appliances do we use it?
An electric motor converts ______.
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 ____________.
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?
Define electric motor.
Observe the following diagram and answer the questions.
- Construction of which equipment does the above diagram show?
- On which principle does this equipment work?
- According to which law the coil ABCD rotates?
- Write the law in your own words.
- Where is this equipment used?
