Chapter 6: Electricity

What is a conductor?

• A material that does not allow electricity to pass through it

• A part

• A material that allows electricity to pass through it

• A device for connecting an electric wire

Answer explanation

A conductor is defined as a material that allows electricity to pass through it, making the correct choice "A material that allows electricity to pass through it." The other options describe insulators or unrelated concepts.

What does an insulator do?

• Measures the strength of electricity

• Connects components in a circuit

• Does not allow electricity to pass through it

• Allows electricity to pass through it

Answer explanation

An insulator is a material that does not allow electricity to pass through it, making it essential for preventing unwanted electrical flow and protecting components in a circuit.

What is a circuit?

• A type of battery

• A part of a lamp

• A pathway where electric current flows

• A source of energy

Answer explanation

A circuit is defined as a pathway where electric current flows. This is the fundamental concept of a circuit, distinguishing it from other options like batteries or lamp parts.

What is a cell in a circuit?

• A type of insulator

• A source of energy or power

• A device for measuring voltage

• A part that connects wires

Answer explanation

A cell in a circuit is primarily a source of energy or power, providing the necessary voltage and current to drive electrical devices. The other options do not accurately describe the function of a cell.

What is distilled water?

• Water with salts dissolved in it

• Water that has been boiled and cooled to form liquid again

• Water used in circuits

• Water that is safe to drink

Answer explanation

Distilled water is produced by boiling water to create steam and then cooling the steam back into liquid. This process removes impurities and dissolved salts, making the correct choice 'Water that has been boiled and cooled to form liquid again'.

What is the purpose of a connecting wire?

• To hold a lamp in place

• To provide insulation

• To measure voltage

• To connect components of a circuit

Answer explanation

The purpose of a connecting wire is to connect components of a circuit, allowing electricity to flow between them. This is essential for the circuit to function properly.

What does a lamp do in a circuit?

• It connects wires

• It measures electricity

• It stores energy

• It lights up

Answer explanation

A lamp in a circuit primarily functions to light up when electricity flows through it. This is its main purpose, distinguishing it from components that connect wires, measure electricity, or store energy.

What is a plug?

• A source of energy

• A type of battery

• A part of a lamp holder

• A device for connecting an electric wire to a supply

Answer explanation

A plug is specifically designed as a device for connecting an electric wire to a supply, allowing electrical devices to receive power. This distinguishes it from other options like batteries or lamp parts.

What is mains electricity?

• Electricity sent to homes and schools

• Low voltage electricity

• Electricity that does not flow

• Electricity used in batteries

Answer explanation

Mains electricity refers to the electrical power supplied to homes and schools, typically at a standard voltage. It is not low voltage, does flow, and is different from battery power.

What is a pylon?

• A part of a circuit

• A type of battery

• A device for connecting wires

• A structure that carries cables from power stations

Answer explanation

A pylon is a structure that supports and carries high-voltage cables from power stations to distribution networks, making it essential for electricity transmission. The other options do not accurately describe a pylon.