What is a conductor, and how does it function in an electric circuit?

A conductor allows current flow.

• Conductors facilitate electric flow.

• Essential in circuit completion.

• Bulbs light up when connected.

Fill in the blank: An insulator is a material that does not allow electric current to flow easily, thus ___ the circuit.

Breaking

True or False: Conductors have low conductivity compared to insulators.

False. Conductors have high conductivity, while insulators have low or no conductivity.

Riddle: I am a material that can light up a bulb when placed in a circuit, but I break the flow when I am absent. What am I?

A conductor

What is the purpose of testing conductivity in materials?

Testing conductivity determines material type.

• Identifies conductors vs insulators.

• Uses a closed circuit method.

• Essential for electrical applications.

Fill in the blank: Common materials tested for conductivity include metals like copper and steel, and non-metals like plastic and ___.

Rubber

Multiple Choice: Which of the following materials is an insulator? A) Copper B) Steel C) Plastic D) Aluminum

C) Plastic

What are the primary materials classified as good conductors of electricity?

Metals are good conductors.

• Copper has high conductivity.

• Gold resists corrosion effectively.

• Silver is the best conductor.

Fill in the blank: The human body is a good conductor, which is why contact with live wires can result in an electric shock as current flows through the body to the ___.

Ground

True or False: Insulators allow electric current to flow freely through them.

False. Insulators prevent electric current from flowing through them.

Riddle: I coat wires to keep you safe, preventing shocks and unwanted flow. What am I?

An insulator

What role do insulators play in the design of electrical devices like bulbs?

Insulators, such as glass, separate metal pins in bulbs to ensure that current flows only through intended paths, maintaining circuit integrity.

Fill in the blank: Materials like plastic, rubber, and glass are classified as ___ because they do not conduct electricity well.

Insulators

Short Answer: Why are copper wires commonly used in electrical circuits?

Copper wires are commonly used because copper is a highly efficient conductor of electricity, allowing for effective current flow to devices.

What happens to insulators under extreme conditions, such as lightning?

Under extreme conditions like lightning, some insulators, such as air, can conduct electricity, allowing current to pass through.

What materials are commonly used as conductors and insulators in electrical wiring?

Copper and plastic are key.

• Copper has high conductivity.

• Plastic insulates effectively.

• Safety from electric shocks.

Fill in the blank: The human body conducts electricity, making ___ essential for safety in electrical systems.

Insulators

True or False: Insulators allow electric current to flow freely.

False. Insulators block electric current, preventing it from flowing.

Riddle: I cover wires to keep you safe, preventing shocks from making you chafe. What am I?

Insulator

How do ceramic caps used in power lines function to prevent current leakage?

Ceramic caps prevent current leakage.

• Insulation keeps current contained.

• Prevents short circuits effectively.

• Enhances safety in power lines.

What role does the plastic coating on electric wires serve?

The plastic coating serves as an insulator, providing safety by preventing electric current from escaping and protecting users from electric shocks.

Fill in the blank: Electric current flows through a closed circuit, lighting a bulb when ___ are used.

Conductors

Multiple Choice: What is the primary function of rubber gloves worn by electricians?

To prevent electric shocks when handling live circuits.

What is the primary role of conductors in electrical systems?

Conductors, such as copper and other metals, allow electric current to flow easily, forming the pathways in circuits.

Fill in the blank: Insulators, such as plastic, rubber, and ceramic, ___ the flow of electric current.

Block