Advertisements
Advertisements
प्रश्न
What is the Principle of an Electric motor?
Write the' principle of working of an electric motor.
Advertisements
उत्तर १
Principle of Electric Motor:
An electric motor works on the principle that a current-carrying conductor placed in a magnetic field experiences a force.
उत्तर २
The working principle of an electric motor is based on the magnetic effect of current. A current-carrying loop experiences a force and rotates when placed in a magnetic field. The direction of rotation of the loop is given by Fleming’s left-hand rule.
APPEARS IN
संबंधित प्रश्न
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
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?
Of what substance is the core of the coil of an electric motor made?
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.
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?
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:
both current and magnetic field were reversed simultaneously.
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
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 a proper explanation.
Which device is used to produce electricity? Describe with a neat diagram.
Electric motor : converts electrical energy into mechanical energy : : Electric generator : _______
Right or wrong sentence.
Electro chemicals are devices that convert electrical energy into mechanical energy.
What is an electric motor?
In which electric motor appliances do we use it?
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 ____________.
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?
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?
How can the speed of rotation of a coil be increased? Write at least three methods.
The moving part of an electric motor is called ______.
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?
