Electrical Science Level 3 8202

What is the SI unit of electric current?

• D

• C

• A

• B

What is the formula to calculate electrical power?

• P = V * I

• P = V - I

• P = V / I

• P = V + I

What is the purpose of a transformer in an electrical circuit?

• To change the color of the circuit

• To change the voltage level

• To cook food in the circuit

• To play music in the circuit

Explain the concept of electrical resistance.

• The ability of a material to conduct electricity without any resistance

• The measure of the amount of electric current in a material

• Opposition to the flow of electric current in a material

• The force that pushes electric current through a material

What is the difference between AC and DC electricity?

• AC electricity changes direction periodically, while DC electricity flows in one direction only.

• AC electricity is used for heating, while DC electricity is used for lighting.

• AC electricity flows in one direction only, while DC electricity changes direction periodically.

• AC electricity and DC electricity are the same thing.

What is Ohm's law and how is it used in electrical science?

• Ohm's law is a fundamental principle in electrical science that relates the voltage, current, and resistance in a circuit.

• Ohm's law is a cooking technique used to make pasta

• Ohm's law is a type of dance popular in the 1980s

• Ohm's law is a mathematical equation used to calculate the circumference of a circle

Describe the function of a circuit breaker in an electrical system.

• It increases the flow of electricity when a fault is detected.

• It has no impact on the flow of electricity in case of a fault.

• It automatically interrupts the flow of electricity when a fault is detected.

• It only interrupts the flow of electricity when there is no fault.

What are the different types of electrical circuits?

• Positive circuits, negative circuits, and neutral circuits

• Circular circuits, square circuits, and triangular circuits

• Series circuits, parallel circuits, and series-parallel circuits

• Direct circuits, indirect circuits, and mixed circuits

Explain the concept of electrical capacitance.

• The ability of a system to generate heat

• The ability of a system to store an electric charge

• The ability of a system to conduct sound

• The ability of a system to produce light

What safety measures should be followed when working with electrical equipment?

• Use insulated tools, wear appropriate personal protective equipment, de-energize equipment before working on it, and follow proper lockout/tagout procedures.

• Wear metal jewelry while working with electrical equipment

• Use wet hands when handling electrical equipment

• Ignore warning labels and safety instructions