AC Generator Quiz

What is the main function of the armature in an AC generator?

• Converts electrical power to mechanical power

• Generates magnetic field

• Controls the flow of current

• Transfers electrical energy to mechanical energy

What is the purpose of the slip rings in an AC generator?

• To bridge transfer and carry power to and from the rotor

• To generate magnetic field

• To control the flow of current

• To convert mechanical energy to electrical energy

What is the role of the field magnets in an AC generator?

• Transfer electrical energy to mechanical energy

• Produce radial magnetic field

• Control the flow of current

• Generate electromagnetic force

What is the function of the brushes in an AC generator?

• Generate magnetic field

• Control the flow of current

• Convert mechanical power to electrical power

• Connect to the rotating slip ring and the external circuit

According to Fleming's right-hand rule, what does the thumb indicate when the armature rotates in an AC generator?

• Direction of movement of the armature

• Direction of induced current

• Direction of magnetic field

• Direction of force

What happens to the induced EMF during the first quarter of rotation of the armature in an AC generator?

• Increases from zero to maximum value

• Decreases from maximum value to zero

• Remains constant at maximum value

• Stays at zero throughout the rotation

During which quarter of rotation does the induced EMF have a maximum negative value in an AC generator?

• Third quarter

• Fourth quarter

• First quarter

• Second quarter

What does the term AC or alternating current generally refer to?

• A time varying waveform or sinusoid

• A direct current flow

• A constant electrical flow

• A magnetic field variation

What is the purpose of the galvanometer in an AC generator?

• To show the flow of current in the external circuit

• To control the flow of current

• To convert mechanical energy to electrical energy

• To generate magnetic field

What is the principle on which an AC generator works?

• Electromagnetic induction

• Nuclear fusion

• Electrostatic force

• Magnetic resonance