Grade 1 Physics Quiz: DC Generator

What are the main parts of a DC generator?

• solenoid, diode, transistor, resistor

• anode, cathode, electrolyte, voltage

• battery, resistor, capacitor, inductor

• armature, field winding, commutator, and brushes

How is the armature of a DC generator constructed?

• Attaching the armature to a steel core

• Using plastic tubing to form the armature

• Winding insulated copper wire around a soft iron core

• Wrapping the armature with aluminum foil

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

• To store excess energy

• To reverse the direction of the current in the coil

• To increase the speed of the generator

• To regulate the voltage output

How does a DC generator convert mechanical energy into electrical energy?

• By converting light energy into electrical energy

• Through the process of electromagnetic induction

• By converting heat energy into electrical energy

• By converting sound energy into electrical energy

Explain the working principle of a simple DC generator.

• A simple DC generator works on the principle of nuclear fusion.

• A simple DC generator works on the principle of electromagnetic induction.

• A simple DC generator works on the principle of gravitational force.

• A simple DC generator works on the principle of chemical reactions.

What is the difference between series-wound and shunt-wound DC generators?

• The color of the generator

• The size of the generator

• The material used in the generator

• The field winding connection

What is the effect of armature reaction in a DC generator?

• Decreases the generated voltage and affects commutation

• Has no effect on the generated voltage

• Increases the generated voltage and improves commutation

• Causes the generator to stop working completely

How does the armature reaction affect the performance of a DC generator?

• It increases the efficiency of the generator

• It causes a distortion in the magnetic field

• It has no effect on the performance

• It reduces the speed of the generator