Tag: magnetism and electromagnetism

Quizzes (6) Questions (43)

Questions Related to magnetism and electromagnetism

Multiple choice physics magnetism and electromagnetism electric generator ac generator magnetic effects of electric current

Electric generator ____________.

  1. Converts electric energy into magnetic energy.

  2. Converts electric energy into mechanical energy.

  3. Converts mechanical energy into electrical energy.

  4. Converts magnetic energy into electrical energy.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An electric generator is a machine which generates electricity by using the principle of EMI. It converts mechanical energy into electrical energy.

Multiple choice physics magnetism and electromagnetism electric generator ac generator magnetic effects of electric current

Electric generator (Dynamo) generates electricity by using the principle ______.

  1. electric circuit

  2. magnetic field

  3. electromagnetic induction

  4. none
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electric generator (Dynamo) generates electricity by using the principle electromagnetic induction
The generator/dynamo is made up of stationary magnets (stator) which create a powerful magnetic field, and a rotating magnet (rotor) which distorts and cuts through the magnetic lines of flux of the stator. When the rotor cuts through lines of magnetic flux it makes electricity.

Multiple choice physics magnetism and electromagnetism electric generator ac generator magnetic effects of electric current

In large powerhouse generator, the ________ are stationary and the _______ rotates

  1. electromagnets and coils respectively

  2. induces and commutator respectively

  3. coils and electromagnet respectively

  4. commutators and inducer respectively
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The power house AC generators have a fixed site of coil arranged around a relating electromagnet. Thus, in large power house generators, the coils are stationary are the electromagnet rotates.

Multiple choice physics magnetism and electromagnetism electric generator ac generator magnetic effects of electric current

The major differences between an electric motor and generator are stated below

  1. the generator converts mechanical energy into electrical energy while motor converts electrical energy into mechanical energy.

  2. the generator converts electrical energy into mechanical energy while motor converts mechanical energy into electrical energy.

  3. both

  4. none
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electric Motor
1. It converts electrical energy into mechanical energy.
2. It needs electrical energy for its working.
3. They are used as water pumps, marble grinders e.t.c Generator
1. It converts mechanical energy into electrical energy
2. It needs mechanical energy for its working.
3. They are used as water pumps, marble grinders e.t.c
3. Diesel generator, hydro-electric generator are the examples of it.