Electromagnetic Induction: Class 12 Physics Q&A
3 free answers on Electromagnetic Induction (Physics) for Class 12 students, across CBSE, ICSE and State boards. Includes questions such as “What is induction motor?”, “what is rectifier?”, “How to calculate eMF equation?”
Question & Answer
Questions
- PhysicsClass 12All
What is induction motor?
An induction motor is a type of alternating current (AC) electric motor used for converting electrical energy into mechanical energy. It is one of the most common types of electric motors and is widely used in various applications due to its simplicity, robustness, and cost-effectiveness. Induction motors are also known as asynchronous motors. The operation of an induction motor is based on the principles of electromagnetic induction, which were discovered by Michael Faraday. The main compone
- PhysicsClass 12All
what is rectifier?
A rectifier is an electronic device that converts alternating current (AC) to direct current (DC). AC is a type of electrical current that periodically changes direction, while DC flows in a constant direction. Rectifiers are used in various electronic and electrical applications where a direct current is required. Key points about rectifiers: Purpose: The primary purpose of a rectifier is to convert AC to DC. This process is called rectification, and i
- PhysicsClass 12All
How to calculate eMF equation?
The EMF (electromotive force) equation depends on context: For AC generators: EMF = N × B × A × ω × sin(ωt) N = number of turns B = magnetic field strength A = coil area ω = angular frequency (ω = 2πf) For changing magnetic flux: EMF = -N(dΦ/dt) This is Faraday's Law of electromagnetic induction The frequen