Electricity Basics Flashcard

Front

What is the standard unit of measure for electric current?

Back

Ampere

Answer explanation

The standard unit of measure for electric current is the Ampere, often abbreviated as 'A'. It quantifies the flow of electric charge, distinguishing it from other units like Ohm (resistance), Volt (voltage), and Watt (power).

Front

Which type of circuit allows the same electric current to flow through all parts?

Back

Series circuit

Answer explanation

A series circuit allows the same electric current to flow through all parts because the components are connected end-to-end, creating a single path for the current. In contrast, a parallel circuit has multiple paths.

Front

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

Back

To prevent or slow down the flow of electric current

Answer explanation

A resistor's primary function is to prevent or slow down the flow of electric current in a circuit, thereby controlling the voltage and current levels. This is essential for protecting components and ensuring proper circuit operation.

Front

What does Ohm's law describe?

Back

The relationship between voltage, current, and resistance

Answer explanation

Ohm's law describes the relationship between voltage, current, and resistance in an electrical circuit, stating that voltage equals current multiplied by resistance (V = I × R). This is the correct choice.

Front

Which material is commonly used as an electrical conductor?

Back

Copper

Answer explanation

Copper is widely recognized as an excellent electrical conductor due to its high conductivity and low resistance. In contrast, materials like glass, plastic, and rubber are insulators and do not conduct electricity well.

Front

What happens in a parallel circuit if one part stops working?

Back

The rest of the circuit keeps working

Answer explanation

In a parallel circuit, if one part stops working, the other parts continue to function. This is because each component is connected independently, allowing current to flow through the remaining paths.

Front

What is the role of a battery in an electric circuit?

Back

To store and produce electricity from chemical cells

Answer explanation

The correct choice is that a battery stores and produces electricity from chemical cells. It converts chemical energy into electrical energy, providing the necessary power for the circuit.

Front

Which of the following is NOT a good conductor of electricity? Copper, Aluminum, Rubber, Gold

Back

Rubber

Answer explanation

Rubber is an insulator, meaning it does not conduct electricity well. In contrast, copper, aluminum, and gold are all excellent conductors, making rubber the correct choice for the material that is NOT a good conductor.

Front

What happens to the current in a series circuit if more resistance/resistors are added?

Back

It decreases the flow

Answer explanation

In a series circuit, adding more resistance decreases the overall current flow. According to Ohm's Law, as resistance increases, current decreases, making 'It decreases the flow' the correct choice.

Front

Electric current is the flow of which of the following through a wire?

Back

Electrons

Answer explanation

Electric current is the flow of electrons through a wire. Electrons are negatively charged particles that move freely in conductive materials, while protons and neutrons are found in atomic nuclei and do not flow in this manner.