DES10013 - Electrical Basics (Chapter 1)

What is the main focus of the theory of the electron in electrical basics?

• Understanding electron behavior in electric fields

• Understanding proton behavior in magnetic fields

• Exploring neutron properties

• Studying atomic nucleus structure

Which of the following is a nonrenewable energy source?

• Solar energy

• Wind energy

• Coal

• Hydropower

Which of the following is considered a renewable energy source?

• Natural Gas

• Nuclear Energy

• Oil

• Solar Energy

What is the main formula for calculating current (I) in a circuit?

• I = V/R

• I = R/V

• I = V * R

• I = V - R

What does a solar cell primarily convert?

• Chemical energy to electrical energy

• Light energy to electrical energy

• Heat energy to mechanical energy

• Mechanical energy to electrical energy

Which material is most commonly used in solar cells?

• Copper

• Silver

• Silicon

• Gold

What happens when light photons reach the p-n junction in a solar cell?

• They are reflected away

• They create electron-hole pairs

• They convert into sound energy

• They create magnetic fields

Which of the following is a correct description of direct current (DC)?

• The flow of electric charge that periodically reverses direction

• The flow of electric charge that remains constant in direction

• The flow of electric charge in circular paths

• The flow of electric charge in a vacuum

Which is a common source of direct current (DC)?

• Battery

• Alternator

• Transformer

• Inductor

Alternating current (AC) is characterized by:

• A constant flow of electric charge in one direction

• The periodic reversal of electric charge direction

• No flow of electric charge

• The flow of electric charge in a circular path