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प्रश्न
What is dynomo (a.c. generator)? State the principle on which it works.
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उत्तर
Dynamo (or a.c. generator) is a device which converts mechanical energy into electrical energy. It works on the principle of electromagnetic induction.
संबंधित प्रश्न
You are given an iron nail, a torch cell, and a long piece of insulated copper wire. With the help of a labelled neat diagram, describe in steps how you will make the nail, an electromagnet.
Name two factors on which the strength of magnetic field of an electromagnet depends and state how does it depend on the factors stated by you.
State three uses of an electromagnet?
What is an electric motor?
Describe briefly one way of producing an induced current in a coil. State one factor that determines the magnitude of induced e.m.f.
State the purpose of the iron core.
State the condition when an electric charge can give rise to a magnetic field.
What is a permanent magnet? Give one use of it.
What energy conversion takes place during the working of a d c motor?
What are the factors that govern the magnitude of force acting on a current carrying conductor which is freely suspended in a magnetic field?
