Self Excited DC Generator and DC Motor Module 3 Quiz

What is the purpose of the field winding in a DC generator?

To produce the magnetic flux

What is the purpose of the commutator in a DC generator?

To facilitate the collection of current from the armature windings

What is the difference between lap windings and wave windings in a DC machine?

Lap windings are suitable for low voltage, high current machines, while wave windings are suitable for high voltage, low current machines

What is the purpose of the armature core in a DC generator?

To provide a path of very low reluctance to the flux through the armature Signup and view all the answers

What is the purpose of the brushes in a DC generator?

To collect current from the armature windings Signup and view all the answers

What is the purpose of field excitation in a DC generator?

To energize the field windings and set up a steady magnetic field Signup and view all the answers

What is the function of the stator in a DC generator?

It is the stationary part of the machine Signup and view all the answers

Which material is commonly used to make the yoke of a DC generator?

Steel Signup and view all the answers

What is the main function of the rotor in a DC generator?

Converts electrical energy into mechanical energy Signup and view all the answers

What type of DC generator has field magnets energized by their own supplied current?

Self-excited DC generator Signup and view all the answers

At what condition does a DC generator achieve maximum efficiency?

When the constant losses are equal to the variable losses Signup and view all the answers

In a DC generator, what do the pole shoes do?

Represent the direction of thrust on the conductor Signup and view all the answers

What is the voltage regulation of a DC generator?

The percentage rise in the terminal voltage when the load is removed Signup and view all the answers

Which part of a DC generator helps link an electrical energy system to another energy system?

Rotor Signup and view all the answers

What is the function of the pole in a DC generator?

Provides a reversible means of energy flow in its magnetic field Signup and view all the answers

According to Faraday's law, what can induce an electromotive force in a conductor?

A changing magnetic field Signup and view all the answers

What type of DC motor has a permanent magnet on the inner periphery of the stator?

Permanent magnet DC motor Signup and view all the answers

Which law describes the force experienced by a charged particle in the presence of electric and magnetic fields?

Lorentz law Signup and view all the answers