A.C generator is a device which converts:
Correct answer: B. Mechanical energy into electrical energy
- A. Electrical energy into mechanical energy
- B. Mechanical energy into electrical energy
- C. Chemical energy into mechanical energy
- D. Heat energy into electrical energy
Explanation
An AC generator is a device that converts mechanical energy into electrical energy.AC generators, also known as alternators, operate based on the principle of electromagnetic induction. They convert mechanical energy, typically from a rotating shaft or turbine, into electrical energy. As the coil of wire within the generator rotates in a magnetic field, it induces an alternating current (AC) in the coil.
Last updated
About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
Practise Electromagnetic Induction
288 free Electromagnetic Induction MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A 25 wattand 100 watt bulbs are joined in series and connected to the mains.Which bulb will glow brighter?
A 50 mH coil carries a current of 2A. The energy stored in its magnetic field is:
A.C is converted into D.C by:
A coil has an inductance of 0.02 Henry. When a current in the coil is changing at the rate of 150 A/S then the induced emf will be:
A coil of 10 cm x 20 cm having 40 turns in making 18.00 rev/min in a magnetic field 0.5 wb/m2. The peak value of the induced emf is: