Question
Download Solution PDFIn motor applications, efficiency of the motor is always less than 100% due to conversion of the _____.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFElectrical Motor
- An electric motor is an electric machine that converts electrical energy into mechanical energy.
- Most electric motors operate through the interaction between the motor’s magnetic field and electric current in a wire winding.
- This interaction generates a force (as per Faraday’s Law) in the form of torque which is applied to the motor’s shaft.
- Since the input energy is converted into heat, there are mechanical losses such as friction and windage loss at the motor's shaft due to which the efficiency of the motor is always less than 100%.
- The efficiency of electrical motors being less than 100% is consistent with the Law of Conservation of Energy. The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another.
- In the case of electrical motors, some of the electrical energy is inevitably converted into other forms of energy, such as heat and sound, due to factors like friction and resistance in the motor's components.
- This loss of energy reduces the overall efficiency of the motor, but it does not violate the Law of Conservation of Energy because the total amount of energy in the system remains constant.
Last updated on Jul 1, 2025
-> SSC JE Electrical 2025 Notification is released on June 30 for the post of Junior Engineer Electrical, Civil & Mechanical.
-> There are a total 1340 No of vacancies have been announced. Categtory wise vacancy distribution will be announced later.
-> Applicants can fill out the SSC JE application form 2025 for Electrical Engineering from June 30 to July 21.
-> SSC JE EE 2025 paper 1 exam will be conducted from October 27 to 31.
-> Candidates with a degree/diploma in engineering are eligible for this post.
-> The selection process includes Paper I and Paper II online exams, followed by document verification.
-> Prepare for the exam using SSC JE EE Previous Year Papers.