PND Chapter 2

What is the primary function of an AC generator?

• To convert direct current (DC) to alternating current (AC)

• To store electrical energy for later use

• The primary function of an AC generator is to generate alternating current (AC) electricity.

• To regulate voltage levels in a power grid

How does electricity create a magnetic field in a wire?

• A magnetic field is created by static electricity in a wire.

• Electricity creates a magnetic field only in superconductors.

• Electricity creates a magnetic field in a wire by the flow of electric current.

• Electricity has no effect on magnetic fields in wires.

What happens when a wire is moved in a magnetic field?

• The wire becomes magnetized.

• The wire heats up instantly.

• The wire breaks into pieces.

• A current is induced in the wire.

What is the relationship between magnetic field strength and voltage produced?

• Induced voltage is inversely proportional to the magnetic field strength.

• Induced voltage is directly proportional to the magnetic field strength.

• Induced voltage is only affected by temperature, not magnetic field strength.

• Magnetic field strength has no effect on induced voltage.

What are some common power sources for generators? Gasoline, natural gas, propane, solar, wind,

• Coal

• Tidal energy

• Batteries

• Diesel

Explain the principle of magnetic induction in generators.

• The principle of magnetic induction is based on the movement of electrons in a conductor without any magnetic field.

• Magnetic induction in generators relies solely on static magnetic fields.

• Generators operate on the principle of thermal induction to produce electricity.

• Involves the induction of (EMF) in a coil due to a change in magnetic flux as the coil rotates in a magnetic field.

What role does a loop of wire play in electricity generation?

• A loop of wire stores electrical energy for later use.

• A loop of wire acts as a resistor to limit current flow.

• A loop of wire generates heat instead of electricity.

• A loop of wire generate (EMF) in a magnetic field, enabling product of electricity.

How does the speed of wire movement affect voltage generation?

• Faster wire movement generates higher voltage.

• Wire movement has no effect on voltage generation.

• Slower wire movement generates higher voltage.

• Voltage generation is constant regardless of wire speed.

What types of industries rely heavily on AC power?

• Fashion, entertainment, and tourism

• Real estate, insurance, and legal services

• Manufacturing, telecommunications, healthcare, and commercial sectors.

• Agriculture, mining, and forestry

Why is AC power preferred in many applications over DC power?

• AC power is less efficient for long-distance transmission.

• AC power is more dangerous than DC power.

• DC power is easier to generate than AC power.

• AC power is preferred for its efficient transmission, ease of voltage transformation, and compatibility with appliances.