Generators and Dynamos Quiz

What is the purpose of a generator or dynamo?

• To convert mechanical rotation into electric power

• To store substantial amounts of electricity

• To create alternating current power

• To conduct scientific tests

What is the difference between a dynamo and a generator?

• A dynamo creates direct current power, while a generator creates alternating current power

• A dynamo creates alternating current power, while a generator creates direct current power

• A dynamo uses electromagnetism, while a generator uses chemical reactions

• A dynamo uses chemical reactions, while a generator uses electromagnetism

Which of the following tools are necessary to create/store substantial amounts of electricity for human use?

• Generators, dynamos, and batteries

• Generators, dynamos, and transformers

• Generators, dynamos, and solar panels

• Generators, dynamos, and wind turbines

What is the basic principle behind the working of a generator or dynamo?

• Rotating magnets cut through the magnetic field created by stationary magnets, inducing electric power

• Rotating magnets create a magnetic field, which generates electric power in stationary magnets

• Rotating magnets create a chemical reaction, which generates electric power in stationary magnets

• Rotating magnets create a mechanical rotation, which generates electric power in stationary magnets

What is the formula to calculate the strength of a generator?

• e = B x l x v

• e = B + l + v

• e = B / l / v

• e = B - l - v

What are the magnets in a generator or dynamo usually made of?

• Copper or aluminum wire coiled around an iron core

• Natural magnetite or permanent magnets

• Graphite or carbon brushes

• Small wires arranged in a tubular shape

What is the purpose of a commutator in a dynamo?

• To allow current to flow in only one direction

• To switch between direct current and alternating current

• To regulate the strength of the magnetic field

• To connect the generator to the main circuit

How is a dynamo self-excited?

• The armature retains some magnetism or a battery is used to excite the solenoids

• The armature generates power from the rotating motion

• The stator provides power to the armature through brushes

• The commutator controls the flow of electricity

What is the main difference between a dynamo and a generator?

• A dynamo produces direct current power, while a generator produces alternating current power

• A dynamo uses brushes and a commutator, while a generator uses slip rings and brushes

• A dynamo has a fixed structure, while a generator has a rotating armature

• A dynamo requires self-excitation, while a generator does not

What type of power does a generator produce?

• Alternating current

• Direct current

• Mechanical rotation

• Chemical reaction