Draw a labelled diagram of an electric motor. Explain its principle and work. What is the function of a split ring in an electric motor?

Asked by Vishal kumar | 1 year ago |  174

1 Answer

Solution :-

An electric motor is a device that converts electrical energy to mechanical energy. It works on the principle of magnetic effect of current. The figure listed below shows a simple electric motor.

When current is made to flow through the coil MNST by closing the switch, the coil starts to rotate in the anticlockwise direction. This is due to the downward force acting on the length MN and simultaneously an upward force acting along the length ST. As a result of which, the coil rotates in the anticlockwise direction. Current in the length MN flows from M to N and the magnetic fields act from left to right normal to the length MN. According to Fleming’s Left-hand rule, a downward force acts along the length MN. Similarly, the current along the length ST flows from S to T and the magnetic field acts from left to right. Therefore, an upward force acts along the length of ST. These two forces together cause the coil to rotate anti-clockwise. After half a rotation, the position of MN and ST interchange. The half ring C come in contact with brush B and the half ring D comes in contact with rush C. Hence the direction of current in the coil MNST gets reversed.

Answered by Shivani Kumari | 1 year ago

Related Questions

Explain the underlying principle and working of an electric generator by drawing a labeled diagram. What is the function of brushes?

Class 10 Science Magnetic Effects of Electric Current View Answer

State the rule to determine the direction of an

(i) magnetic field produced around a straight conductor carrying current,

(ii) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it, and

(iii) current induced in a coil due to its rotation in a magnetic field.

Class 10 Science Magnetic Effects of Electric Current View Answer

Two circular coils A and B are placed closed to each other. If the current in coil A is changed, will some current be induced in the coil B? Give a reason

Class 10 Science Magnetic Effects of Electric Current View Answer