Understanding Electrical Circuits

What is the function of a resistor in a circuit?

• To store electrical energy in a circuit.

• To increase the current flow in a circuit.

• To limit current and control voltage in a circuit.

• To convert electrical energy into heat without resistance.

Name three common components found in electrical circuits.

• Transformer

• Diode

• Transistor

• Resistor, Capacitor, Inductor

What safety equipment should be used when working with electricity?

• Hard hats

• Ear protection

• Dust masks

• Insulated gloves, safety goggles, rubber-soled shoes, voltage tester.

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

• To increase the current flow in the circuit.

• To convert electrical energy into heat.

• To store electrical energy for later use.

• To protect the circuit from overcurrent by breaking the circuit when the current is too high.

Define what a conductor is and give two examples.

• Wood and plastic

• Rubber and glass

• Iron and steel

• Examples of conductors include copper and aluminum.

What is an insulator? Provide two examples.

• Wood, Steel

• Copper, Aluminum

• Rubber, Glass

• Plastic, Iron

Why is it important to turn off the power before working on a circuit?

• Power must be left on to test the circuit while working.

• It is important to turn off the power to prevent electrical shock and ensure safety.

• It is safe to work on a live circuit without precautions.

• Turning off the power is unnecessary for minor repairs.

What does a circuit breaker do?

• A circuit breaker interrupts electrical flow to prevent overloads and faults.

• A circuit breaker amplifies electrical signals for better performance.

• A circuit breaker stores excess energy for later use.

• A circuit breaker regulates the temperature of electrical devices.

Explain the difference between series and parallel circuits.

• Series circuits have multiple paths for current, while parallel circuits have a single path.

• Series circuits can operate independently, while parallel circuits cannot.

• Series circuits have a single path for current, while parallel circuits have multiple paths.

• In series circuits, the voltage is divided, while in parallel circuits, the current is divided.

What material is commonly used as a conductor in electrical wiring?

• Rubber

• Copper

• Plastic

• Aluminum