What is electric Motor state principal and draw its diagram and discuss role of
commentator a
nd carbon brushes long question
Answers
Answer:
Electrical energy is converted in into mechanical energy in an electric motor.
Working of electric motor:
As shown in the diagram, when a current is passed through the coil PQRS the coil starts rotating anti clockwise because a downward force acts on length PQ and at the same time an upward force acts on RS. Therefore, the coil rotates in anti clockwise direction. In the length PQ, current flows from P to Q and magnetic field acts from left to right. According to Fleming's left hand rule a downward force acts on the length PQ and an upward force acts on length RS. These two forces causes the coil to rotate anti clockwise.
When coil complete half rotation, the position of PQ and RS interchange, the half ring D comes in contact with brush A and half-rign C comes in contact with brush B, therefore the direction of current in coil PQRS gets reversed. Now the current flows through the coil in the direction SRQP. The direction of the current through the coil PQRS reverse after every half rotation. As a result, the coil rotates in same direction. The split rings help to reverse the direction of current in the circuit.
explanation -please mark me as brainliest
Answer:
mark me as brainleast
Explanation:
: An electric motor is a device which converts electrical energy into mechanical energy. The principle behind the electric motor is based on Fleming’s left hand rule.
Labelled Diagram of an electric Motor
Working: When a current is allowed to flow through the coil PQRS the coil starts rotating anti-clockwise. This happens because a downward force acts on length PQ and at the same time, an upward force acts on length RS. As a result, the coil rotates anti-clockwise.
Current in the length PQ flows from P to Q and the magnetic field acts from left to right, normal to length PQ. Therefore, according to Fleming’s left hand rule, a downward force acts on the length PQ. Similarly at an upward force acts on the length RS. These two forces cause the coil to rotate anti-clockwise.
When coil complete half rotation, the position of PQ and RS interchange. The half-ring D comes in contact with brush A and half-ring C comes in contact with brush B. therefore the direction of current in the coil PQRS gets reversed. Now the current flows through the coil in the direction SRQP.
Labelled Diagram of Electric Motor
The direction of current through the coil PQRS reverse after every half rotation. As a result, the coil rotates in same direction. The split rings help to reverse the direction of current in the circuit. These are called the commutator.