Simple Circuits

A route through which electrical current can flow is called

• voltage

• watts

• circuit

• electricity

Answer explanation

A route through which electrical current can flow is called a circuit. Voltage refers to the potential difference, watts measure power, and electricity is the general term for electric charge. Thus, the correct answer is circuit.

Conductors allow

• movements of both electrons and heat

• no movement of electrons

• only heat

• only electricity

Answer explanation

Conductors allow the movement of both electrons and heat. This means they can conduct electricity (via electron movement) and transfer thermal energy, making the first answer choice correct.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS3-3

NGSS.MS-PS3-4

The two conductor wires inside the bulb are separated by

• an insulator

• a different conductor

• a battery

• a base

Answer explanation

The two conductor wires inside the bulb are separated by an insulator, which prevents electrical current from flowing between them, ensuring the bulb functions correctly.

Which of the following best explains a complete circuit?

• when the electricity's path is broken

• when there are multiple circuits

• when the path for electrons is not broken going from negative to positive

• when the electrons start at the positive

Answer explanation

A complete circuit allows electrons to flow continuously from the negative terminal to the positive terminal. The correct choice highlights that the path for electrons must remain unbroken for the circuit to function.

What is the name of the unbroken path that electrons follow?

• closed circuit

• open circuit

• double circuit

• circuit city

Answer explanation

The unbroken path that electrons follow is called a closed circuit. In a closed circuit, electricity can flow continuously, allowing devices to operate. An open circuit, on the other hand, interrupts this flow.

A light will not light unless there is a

• closed circuit

• double circuit

• parallel circuit

• open circuit

Answer explanation

A light requires a closed circuit to allow current to flow. In a closed circuit, all components are connected, enabling the light to turn on. An open circuit, on the other hand, breaks the flow, preventing the light from lighting.

Which of the following would allow the light to turn on?

• 
• 
• 
• 

What is the function of a resistor in an electrical circuit?

• To limit the flow of current

• To increase the current

• To store electrical energy

• To decrease the voltage

Answer explanation

The function of a resistor in an electrical circuit is to limit the flow of current. This helps protect components from excessive current that could cause damage, making 'to limit the flow of current' the correct choice.

Which material is commonly used as an insulator in electrical circuits?

• Iron

• Copper

• Aluminum

• Rubber

Answer explanation

Rubber is commonly used as an insulator in electrical circuits because it does not conduct electricity, preventing unwanted current flow. In contrast, materials like iron, copper, and aluminum are conductors.

What happens to the current in a series circuit if one component fails?

• The current stops flowing

• The current remains the same

• The current decreases

• The current increases

Answer explanation

In a series circuit, all components are connected in a single path. If one component fails, it breaks the circuit, causing the current to stop flowing completely.