The principle of generation of induced current in a coil by rotating it in a magnetic field is used in the making of which of the following electrical devices?

Options :
  1. Electromagnet
  2. Electric motor
  3. Electric generator
  4. Electric watt meter
Answer and Explanation :-

Answer: Option 3


In electricity generation, an electric generator is a device that converts mechanical energy to electrical energy. A generator forces electric current to flow through an external circuit. Electric generators are essentially coils of electric conductors, usually copper wire, that are tightly wound onto a metal core and are mounted to spin around inside an array of large magnets. Anytime an electric conductor moves through a magnetic field, the magnetism will interact with the electrons in the conductor to induce a flow of electrical current within it. The conductor coil and its core are called the armature. By connecting the armature to the shaft of a mechanical power source, such as an engine, the copper conductor can spin at very high speeds through the magnetic field, producing a powerful flow of electricity. The same principle applies whether the generator is driven by a bicycle wheel, a tractor engine or a steam turbine.

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : Which of the following chemical compounds are used to coat the tape of a tape recorder?

Next Question : What following type of material should be used for the safety fuse?

Click here for online test on General Science


 (Getemail alerts when others member replies)

Bursts of hope make despair harder to live with.
-Bethany Griffin Masque of the Red Death